XSol Diagnostic System

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

4711647 ARISTON MICROGENUS 28 MFFI HE LPG

WARNING - IMPORTA

Next: &12, *

NO FAULT FOUND

Next: nff

OBSERVATION PUMP OVERRUN

PRE-HEAT SWITCHED OFF (TURN COMFORT SWITCH TO E POSITION)

Next: &nff, !f67

OBSERVATION PREHEAT OPERATION

PRE-HEAT SWITCHED ON

Next: &2, f2394

CH OPERATION

CH TEMPERATURE CONTROL SET TO MAX

Next: &3, ?60, ?62, ?64, ?698

DHW OPERATION

DHW TEMPERATURE SET TO MAX

Next: &2010, ?50, ?52, ?54, ?56

OBSERVATION BOILER REACTS TO CH DEMAND

CH TEMPERATURE CONTROL SET TO MAX
ENSURE BOILER IS COOL

Next: &5, f49

OBSERVATION BURNER IGNITION & ESTABLISH

Next: &6, ?168, ?170, ?852

OBSERVATION FAN RUNS DHW DEMAND

DHW TEMPERATURE SET TO MAX

Next: &72, f1677

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &36, !f35

CASE REMOVAL

CONTROL PANE

Next: &784, !f13

POWER UP SELF TEST

PRE-HEAT SWITCHED OFF (TURN COMFORT SWITCH TO E POSITION)
ENSURE NO DEMANDS ARE PRESENT

Next: &11, ?17, ?746, ?763, ?2410

OPERATIONAL SEQUENCE

SELECT FROM THE LIST

Next: &38, !f37

DHW FLOW RATE

Next: &9, f794

OBSERVATION PUMP RUNNING

DHW TEMPERATURE SET TO MAX

Next: &8, f73

BOILER INITIAL SETUP

Next: &2151, !f785

OBSERVATION DISPLAY

Next: &14, f985

FURTHER INVESTIGATION FUSE PCB BLOWN

NOT USED

Next: &nff, f2447

FAULT CODE E02

NOT USED

Next: &nff, f1125

FAULT CODE E04 - E05

NOT USED

Next: &nff, f2333

FAULT CODE E06 - E07

NOT USED

Next: &nff, f2342

FAULT CODE E33

NOT USED

Next: &nff, f2286

FAULT CODE E34

NOT USED

Next: &nff, f1169

FAULT CODE E21

NOT USED

Next: &nff, f2351

FAULT CODE E08 - E09

NOT USED

Next: &nff, f2358

FAULT CODE A03

NOT USED

Next: &nff, f1222

FAULT CODE A97 / A98 / A99

NOT USED

Next: &nff, f2299

FAULT CODE A77

NOT USED

Next: &nff, f2491

FAULT CODE E99

NOT USED

Next: &nff, f1391

FAULT CODE A75-A79

NOT USED

Next: &nff, f1396

FAULT CODE E20

NOT USED

Next: &nff, f1452

NO DISPLAY FURTHER INVESTIGATION

INTENTIONALLY BLANK

Next: &nff, f1597

FAULT CODE A90

NOT USED

Next: &nff, f2326

FAULT CODE SC

NOT USED

Next: &nff, f1861

FAULT CODE T5

NOT USED

Next: &nff, f1872

ACTIVATE SC MODE - MAXIMUM OUTPUT

Next: &nff, !f1954

BURNER PRESSURE MODULATION - DHW

ADJUST DHW FLOW RATE

Next: &4, f2001

CONFIRM BURNER PRESSURE MAXIMUM & MINIMUM

ENSURE HOT WATER TEM

Next: &2000, f2011

BURNER PRESSURE MAXIMUM & MINIMUM - CH

ENSURE HOT WATER TEM

Next: &nff, f2073

FAULT CODE E32

NOT USED

Next: &nff, f2144

INSPECTION WATER INGRESS PCB - WIRING CONNECTIONS

GAIN ACCESS TO PCB AND ALL WIRING CONNECTIONS

Next: &984, !f2152

OBSERVATION DIP SWITCHES - PCB FAULT

Next: &nff, !f2192

FAULT CODE E02

SYSTEM PRESSURE

Next: End

FAULT CODE E34

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE E34 4

FAN

Next: End

FAULT CODE E34

FLUE

Next: End

FAULT CODE E34

MAIN HEAT EXCHANGER

Next: End

FAULT CODE E34

RESTRICTOR FLUE EXHAUST MANIFOLD

Next: End

FAULT CODE E34

RECUPERATOR

Next: End

FAULT CODE E34 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E34

FAN

Next: End

FAULT CODE A03 2

THERMOSTAT - OVERHEAT 103 °C

Next: End

FAULT CODE A03

SYSTEM PRESSURE

Next: End

FAULT CODE A03 2

PUMP

Next: End

FAULT CODE A03

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A03

CABLE - PCB & PUMP

Next: End

CASE OFF

DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE E99

Z REDIRECTION

Next: End

FAULT CODE A75-79

SYSTEM PRESSURE

Next: End

FAULT CODE A75-79

PUMP

Next: End

BURNER PRESSURE MAX - MIN 3

GAS VALVE - HONEYWELL

Next: End

FAULT CODE A75-79 2

THERMOSTAT - LIMIT 90 C

Next: End

FAULT CODE E20

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

PUMP DOES NOT RUN

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FLOW RATE

KIT - SPRING 3 - WAY - DHW

Next: End

PUMP DOES NOT RUN

CABLE - PCB & PUMP

Next: End

FURTHER INVESTIGATION DISPLAY

SYSTEM PRESSURE

Next: End

FURTHER INVESTIGATION DISPLAY

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

FURTHER INVESTIGATION DISPLAY

PROBE - TEMPERATURE - DHW

Next: End

FURTHER INVESTIGATION DISPLAY

THERMOSTAT - LIMIT 90 C

Next: End

FURTHER INVESTIAGTION DISPLAY

THERMOSTAT - OVERHEAT 103 °C

Next: End

FURTHER INVESTIGATION DISPLAY

CONDENSATE EXTERNAL PIPE

Next: End

FURTHER INVESTIGATION DISPLAY

RECUPERATOR

Next: End

FURTHER INVESTIGATION DISPLAY

CABLE - ELEMENT

Next: End

FURTHER INVESTIGATION DISPLAY 4

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW NOT RECOGNISED 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW NOT RECOGNISED

KIT - SPRING 3 - WAY - DHW

Next: End

VOLTAGE FAN LIVE PCB

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAN DOES NOT RUN 2

FAN

Next: End

BURNER DOES NOT IGNITE 2

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE A03 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A75 / A79 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER DOES NOT IGNITE

MAIN HEAT EXCHANGER

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

BURNER DOES NOT IGNITE

RESTRICTOR FLUE EXHAUST MANIFOLD

Next: End

BURNER DOES NOT IGNITE

RECUPERATOR

Next: End

BURNER PRESSURE MAX - MIN 2

GAS VALVE - HONEYWELL

Next: End

BURNER PRESSURE MAX MIN 2

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

FAULT CODE A75

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

FAULT CODE E34 2

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

CH OPERATION

KNOB - DHW/CH

Next: End

FAULT CODE T5

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

SC DISPLAYED

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E20

FAULT CODE RESET

Next: End

FAULT CODE E20 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

MAXIMUM MODE SC

Z REDIRECTION

Next: End

DHW RUNS HOT AND COLD 4

PIPE - COMPENSATION

Next: End

DHW RUNS HOT AND COLD 5

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 4

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER PRESSURE MAX MIN

INLET PRESSURE

Next: End

DHW RUNS HOT AND COLD 5

PIPE - COMPENSATION

Next: End

BURNER PRESSURE MAX - MIN 5

GAS VALVE - HONEYWELL

Next: End

BURNER PRESSURE MAX MIN 4

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

FAULT CODE A34

HARNESS-LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE 4

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A34 4

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE E34 5

FAN

Next: End

FAULT CODE E34 2

FLUE

Next: End

FAULT CODE E34 2

MAIN HEAT EXCHANGER

Next: End

FAULT CODE E34 2

RESTRICTOR FLUE EXHAUST MANIFOLD

Next: End

FAULT CODE E34 2

RECUPERATOR

Next: End

FAULT CODE A34 3

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE A34 2

SWITCH AIR PRESSURE

Next: End

BOILER FIRES WITH NO DEMAND

Next: End

BURNER PRESSURE MAX MIN 1

INLET PRESSURE

Next: End

DHW RUNS HOT AND COLD 6

PIPE - COMPENSATION

Next: End

BURNER PRESSURE MAX - MIN 6

GAS VALVE - HONEYWELL

Next: End

BURNER PRESSURE MAX MIN 5

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

BURNER DOES NOT IGNITE 2

INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE 4

GAS VALVE - HONEYWELL

Next: End

BURNER DOES NOT IGNITE 4

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER DOES NOT IGNITE

INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER DOES NOT IGNITE

GAS VALVE - HONEYWELL

Next: End

BURNER DOES NOT IGNITE 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER DOES NOT IGNITE 3

INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE 5

GAS VALVE - HONEYWELL

Next: End

BURNER DOES NOT IGNITE 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E32

WATER INGRESS

Next: End

FAULT CODE E32

KIT-MODULE (EEPROM CMP3)

Next: End

FAULT CODE E32

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E32 2

WATER INGRESS

Next: End

FAN DOES NOT RUN

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN

SWITCH AIR PRESSURE

Next: End

FAN DOES NOT RUN

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAN DOES NOT RUN

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

FAN DOES NOT RUN

PROBE - TEMPERATURE - DHW

Next: End

BOILER COOL RADS COOL 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BOILER AND RADS TEMP LOW

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

DIP SWITCH

DIRECTION CHOICE OR CONTINUE

Next: End

DOES NOT MODULATE

PROBE - TEMPERATURE - DHW

Next: End

DHW OPERATION

KNOB - DHW/CH

Next: End

DHW COOL RADS COOL

PUMP

Next: End

DHW COOL RADS COOL

PROBE - TEMPERATURE - DHW

Next: End

DHW COOL RADS COOL

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

DHW COOL RADS COOL

RECUPERATOR

Next: End

DHW COOL RADS COOL

INLET PRESSURE

Next: End

DHW RUNS HOT AND COLD 3

PIPE - COMPENSATION

Next: End

BURNER PRESSURE MAX - MIN 4

GAS VALVE - HONEYWELL

Next: End

BURNER PRESSURE MAX MIN 3

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

DHW COOL RADS COOL

INJECTOR

Next: End

DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

DHW RUNS HOT THEN COLD

PUMP

Next: End

DHW RUNS HOT AND COLD

RECUPERATOR

Next: End

DHW RUNS HOT THEN COLD

PROBE - TEMPERATURE - DHW

Next: End

DHW RUNS HOT THEN COLD

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

DHW RUNS HOT AND COLD

INLET PRESSURE

Next: End

DHW RUNS HOT AND COLD 2

PIPE - COMPENSATION

Next: End

BURNER PRESSURE MAX - MIN

GAS VALVE - HONEYWELL

Next: End

BURNER PRESSURE MAX & MIN

GAS VALVE - ADJUSTMENT BURNER PRESSURE

Next: End

DHW RUNS HOT AND COLD

PIPE - COMPENSATION

Next: End

DHW RUNS HOT AND COLD

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW RUNS HOT COLD

SYSTEM PRESSURE

Next: End

FAULT CODE E33

SWITCH AIR PRESSURE

Next: End

FAULT CODE E33

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE E33

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A97 - 98 - 99

THERMOSTAT - OVERHEAT 103 °C

Next: End

FAULT CODE A97 - 98 - 99

THERMOSTAT - LIMIT 90 C

Next: End

FAULT CODE A97 - 98 - 99

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

FAULT CODE A97 - 98 - 99

PROBE - TEMPERATURE - DHW

Next: End

FAULT CODE A97 - 98 - 99

SWITCH AIR PRESSURE

Next: End

FAULT CODES A97-A98-A99

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

FAULT CODE A97- 98 - 99

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A90

KIT-MODULE (EEPROM CMP3)

Next: End

BURNER DOES NOT IGNITE 2

ELECTRODES - IGNITION

Next: End

FAULT CODE A90

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E04 - E05

PROBE - TEMPERATURE - DHW

Next: End

FAULT CODE E04 - E05

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E06 - E07

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

BURNER DOES NOT IGNITE

ELECTRODES - IGNITION

Next: End

FAULT CODE E06 - E07

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E21

Next: End

FAULT CODE E21

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E08 - E09

KIT-MODULE (EEPROM CMP3)

Next: End

FAULT CODE E08 - E09

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BLOWN STAND BY MODE AT POWER UP

PCB FUSE/S - FUSED SPUR

Next: End

BOILER DOES NOT RESPOND

PCB FUSE/S - FUSED SPUR

Next: End

NO DISPLAY

CABLE - DISPLAY

Next: End

PREHEAT

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

BURNER DOES NOT IGNITE

AIR PRESSURE TUBES - (TRAP - CONDENSATE)

Next: End

DHW NOT RECOGNISED

WIRING - LOW VOLTAGE

Next: End

DISPLAY JUMBLED

KIT-MODULE (EEPROM CMP3)

Next: End

DISPLAY JUMBLED

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER DOES NOT IGNITE

FAN

Next: End

DIP SWITCHES

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAN NOT RUNNING

PCB DIP SWITCH

Next: End

DIP SWITCHES 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

CH TEMPERATURE COOL

PCB DIP SWITCH

Next: End

DIP SWITCHES 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E08 - E09

PCB DIP SWITCH

Next: End

FAULT CODE E32 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E32

PCB DIP SWITCH

Next: End

FURTHER INVESTIGATION FUSE PCB 2

MOTOR - 3 - WAY VALVE

Next: End

FURTHER INVESTIGATION FUSE PCB

PUMP

Next: End

FURTHER INVESTIGATION FUSE PCB

FAN

Next: End

FURTHER INVESTIGATION FUSE PCB

GAS VALVE - HONEYWELL

Next: End

FURTHER INVESTIGATION FUSE PCB

SPARK GENERATOR

Next: End

PCB FUSE BLOWN

MOTOR - 3 - WAY VALVE AND KIT DIVERTER VALVE

Next: End

FAULT CODE A03

KIT - SPRING 3 - WAY - DHW

Next: End

FAULT CODE A01

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A03

RECUPERATOR

Next: End

FAULT CODE A03

Next: End

FAULT CODE A03

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

A77 REOCCURING

CONDENSATE EXTERNAL PIPE

Next: End

A77 REOCCURING

RECUPERATOR

Next: End

FAULT CODE A77

CONDENSATE EXTERNAL PIPE

Next: End

FAULT CODE A77

RECUPERATOR

Next: End

FAULT CODE A77

CABLE - ELEMENT

Next: End

FAULT CODE A77 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A77 2

CONDENSATE EXTERNAL PIPE

Next: End

FAULT CODE A77 2

RECUPERATOR

Next: End

SPARK POSITION

ELECTRODES - IGNITION

Next: End

BURNER DOES NOT IGNITE 2

MAIN HEAT EXCHANGER

Next: End

TYPE DIAG PROCEDURE

DIRECTION CHOICE OR CONTINUE

Next: End

OPERATIONAL SEQUENCE

DIRECTION CHOICE OR CONTINUE

Next: End

BURNER DOES NOT IGNITE

PIPE - COMPENSATION

Next: End

BURNER DOES NOT IGNITE

BURNER

Next: End

CH DOES NOT REACT TO DEMAND

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW TO HOT

PROBE - TEMPERATURE - DHW

Next: End

DHW TO HOT

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

RADS WARM DHW DEMAND

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

RADS WARM DHW DEMAND

CABLE - MOTOR

Next: End

PUMP OVERRUN

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

CH DOES NOT REACT TO DEMAND 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

CH DOES NOT REACT TO DEMAND 4

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

CH DOES NOT REACT TO DEMAND 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

EXCESSIVE SYSTEM PRESSURE

EXPANSION VESSEL

Next: End

RADS DO NOT HEAT

SYSTEM PRESSURE

Next: End

RADS DO NOT HEAT

VALVE ISOLATION FLOW AND RETURN

Next: End

RADS DO NOT HEAT

PUMP

Next: End

RADS DO NOT HEAT

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

RADS DO NOT HEAT

CABLE - MOTOR

Next: End

RADS DO NOT HEAT

KIT - BY-PASS-CH

Next: End

RADS DO NOT HEAT

KIT DIVERTER VALVE

Next: End

SELF TEST

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

SELF TEST

FROST PROTECTION NORMAL OPERATION

Next: End

BOILER FIRES WITH NO DEMAND

DHW SYSTEM

Next: End

BOILER FIRES WITH NO DEMAND

PROBE C/W CLIPS - TEMPERATURE CH

Next: End

INITIAL SET UP

DIRECTION CHOICE OR CONTINUE

Next: End

BOILER FIRES WITH NO DEMAND

KIT - DETECTION - FLOW C/W MAGNET

Next: End

BOILER FIRES WITH NO DEMAND

KIT - SPRING 3 - WAY - DHW

Next: End

FLOW RATE

VALVE 1/2IN - ISOLATION - CW INLET

Next: End

FLOW RATE

COLD WATER SUPPLY

Next: End

BURNER DOES NOT ESTABLISH

PIPE - COMPENSATION

Next: End

BURNER BAFFLES

MAIN HEAT EXCHANGER

Next: End

BURNER DOES NOT ESTABLISH

BURNER

Next: End

BURNER DOES NOT ESTABLISH 2

ELECTRODE DETECTION

Next: End

BURNER DOES NOT ESTABLISH

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER BAFFLES 2

MAIN HEAT EXCHANGER

Next: End

FAULT CODES

Z REDIRECTION

Next: End

FAULT CODE E02

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E02

SWITCH PRESSURE - LOW WATER

Next: End

FAULT CODE E02 2

SWITCH PRESSURE - LOW WATER

Next: End

FAULT CODE E02

3-WAY PRESSURE GAUGE VALVE GROUP

Next: End

FAULT CODE E34 3

FAN

Next: End

FAULT CODE E34 2

FAN

Next: End

FAULT CODE E34

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE E34

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A03

PUMP

Next: End

FAULT CODE A03

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE E99

DIRECTION CHOICE OR CONTINUE

Next: End

FAULT CODE A75-79

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A75-79

THERMOSTAT - LIMIT 90 C

Next: End

FAULT CODE E20

ELECTRODE DETECTION

Next: End

PUMP DOES NOT RUN

PUMP

Next: End

FAULT CODE A03 2

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A03 3

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A03 5

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A75 / A79

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A75-A79 3

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A75-A79 2

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY

SWITCH PRESSURE - LOW WATER

Next: End

FURTHER INVESTIGATION DISPLAY 2

SWITCH PRESSURE - LOW WATER

Next: End

FURTHER INVESTIGATION DISPLAY

3-WAY PRESSURE GAUGE VALVE GROUP

Next: End

FURTHER INVESTIGATION DISPLAY 2

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY 3

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY

Z REDIRECTION

Next: End

FURTHER INVESTIGATION DISPLAY

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FURTHER INVESTIGATION DISPLAY 4

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FURTHER INVESTIGATION DISPLAY 5

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY

CONDENSATE TRAP

Next: End

FURTHER INVESTIGATION 6

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FURTHER INVESTIGATION DISPLAY 6

HARNESS-LOW VOLTAGE

Next: End

FURTHER INVESTIAGTION DISPLAY

PCB-WATER SENSOR

Next: End

FURTHER INVESTIGATION DISPLAY 7

HARNESS-LOW VOLTAGE

Next: End

DHW NOT RECOGNISED 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW NOT RECOGNISED

KIT - DETECTION - FLOW C/W MAGNET

Next: End

FAN DOES NOT RUN

FAN

Next: End

FAN DOES NOT RUN 2

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A03

MAIN HEAT EXCHANGER - WATER WAYS

Next: End

FAULT CODE A03

PCB-WATER SENSOR

Next: End

FAULT CODE A75-A79

PCB-WATER SENSOR

Next: End

BURNER DOES NOT IGNITE 2

FAN

Next: End

BURNER MAX - MIN 2

Z REDIRECTION

Next: End

BURNER MAX - MIN 3

Z REDIRECTION

Next: End

FAULT CODE A75-A79

Z REDIRECTION

Next: End

FAULT CODE T5

FAULT CODE RESET

Next: End

SC DISPLAYED

FAULT CODE RESET

Next: End

FAULT CODE E20

GAS VALVE - HONEYWELL

Next: End

FAULT CODES

DIRECTION CHOICE OR CONTINUE

Next: End

DHW RUNS HOT AND COLD 6

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 7

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 5

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

UNABLE TO ACTIVATE SC MODE 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER MAX - MIN 5

Z REDIRECTION

Next: End

FAULT CODE E34

SWITCH AIR PRESSURE

Next: End

BURNER DOES NOT IGNITE

SWITCH AIR PRESSURE

Next: End

FAULT CODE E34 6

FAN

Next: End

FAULT CODE A34

FAULT CODE RESET - A34

Next: End

BOILER FIRES NO DEMAND

CLOCK

Next: End

DHW RUNS HOT AND COLD 8

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 6

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

UNABLE TO ACTIVATE SC MODE 4

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER MAX - MIN 6

Z REDIRECTION

Next: End

BURNER DOES NOT ESTABLISH 3

Z REDIRECTION

Next: End

BURNER DOES NOT IGNITE 2

GAS VALVE - HONEYWELL

Next: End

BURNER DOES NOT IGNITE

Z REDIRECTION

Next: End

SOLENIOD RESISTANCE OK

GAS VALVE - HONEYWELL / SPARK GENERATOR

Next: End

VALVE SOLENIOD OPEN CCT

GAS VALVE - HONEYWELL

Next: End

VALVE SOLENIOD SHORT CCT

GAS VALVE - HONEYWELL / SPARK GENERATOR

Next: End

BURNER DOES NOT ESTABLISH

Z REDIRECTION

Next: End

BURNER DOES NOT IGNITE 3

GAS VALVE - HONEYWELL

Next: End

FAULT CODE E32

FAULT CODE RESET

Next: End

FAN DOES NOT RUN

SWITCH PRESSURE - LOW WATER

Next: End

FAN DOES NOT RUN 2

SWITCH PRESSURE - LOW WATER

Next: End

FAN DOES NOT RUN

3-WAY PRESSURE GAUGE VALVE GROUP

Next: End

FAN DOES NOT RUN

FAN - VENTURI

Next: End

FAN DOES NOT RUN

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BOILER COOL RADS COOL

Z REDIRECTION

Next: End

BOILER COOL RADS COOL

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW COOL RADS COOL

HEAT EXCHANGER 30KW - SECONDARY

Next: End

DHW COOL RADS COOL

MAIN HEAT EXCHANGER - WATER WAYS

Next: End

DHW RUNS HOT AND COLD 4

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 3

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

UNABLE TO ACTIVATE SC MODDE 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER MAX - MIN 4

Z REDIRECTION

Next: End

DHW COOL RADS COOL

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW RUNS HOT THEN COLD

HEAT EXCHANGER 30KW - SECONDARY

Next: End

DHW RUNS HOT THEN COLD

MAIN HEAT EXCHANGER - WATER WAYS

Next: End

DHW RUNS HOT AND COLD 3

GAS VALVE - HONEYWELL

Next: End

DHW RUNS HOT AND COLD 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

UNABLE TO ACTIVATE SC MODE

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER MAX - MIN

Z REDIRECTION

Next: End

DHW RUN HOT THEN COLD

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

DHW RUNS HOT AND COLD 2

GAS VALVE - HONEYWELL

Next: End

FAULT CODE E33

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE E33

FAN - VENTURI

Next: End

FAULT CODE E33

FAULT CODE RESET

Next: End

FAULT CODE A97 - 98 - 99

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A97 - 98 - 99 3

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A97- 98-99 4

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A97 - 98 - 99 2

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A97 - 98 - 99

FAN - VENTURI

Next: End

FAULT CODE A97 - 98 - 99

FAULT CODE RESET

Next: End

FAULT CODE A90

FAULT CODE RESET

Next: End

FAULT CODE E04 - E05

HARNESS-LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE

SPARK GENERATOR

Next: End

FAULT CODE E04 - E05

FAULT CODE RESET

Next: End

FAULT CODE E06 - E07

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE E06 - E07

FAULT CODE RESET

Next: End

FAULT CODE E21

FAULT CODE RESET

Next: End

FAULT CODE E08 - E09

FAULT CODE RESET

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION FUSED SPUR

Z REDIRECTION

Next: End

FURTHER INVESTIGATION PCB FUSE

Z REDIRECTION

Next: End

NO DISPLAY 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

RESPONDS NO DISPLAY 2

Z REDIRECTION

Next: End

FURTHER INVESTIGATION DOES NOT RESPOND

Z REDIRECTION

Next: End

NO DISPLAY

PCB - CMP3 DISPLAY

Next: End

BOILER RESPONDS NO DISPLAY

Z REDIRECTION

Next: End

FURTHER INVESTIGATION DOES NOT RESPOND 2

Z REDIRECTION

Next: End

NO DISPLAY

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

PRE-HEAT OPERATION

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAN DOES NOT RUN

WIRING - LOW VOLTAGE

Next: End

FAULT CODE E02

WIRING - LOW VOLTAGE

Next: End

FURTHER INVESTIGATION DISPLAY

WIRING - LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD

WIRING - LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE2

WIRING - LOW VOLTAGE

Next: End

BURNER DOES NOT IGNITE 3

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD 2

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD 3

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD 5

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD 4

WIRING - LOW VOLTAGE

Next: End

DHW RUNS HOT AND COLD 6

WIRING - LOW VOLTAGE

Next: End

DISPLAY JUMBLED

FAULT CODE RESET

Next: End

DIP SWITCHES

Z REDIRECTION

Next: End

DIP SWITCHES 2

Z REDIRECTION

Next: End

DIP SWITCHES 3

Z REDIRECTION

Next: End

DIP SWITCHES 4

Z REDIRECTION

Next: End

FURTHER INVESTIGATION FUSE SPUR PCB

CABLE - MOTOR

Next: End

FURTHER INVESTIGATION FUSE SPUR PCB

CABLE - PCB & PUMP

Next: End

FUSE FURTHER INVESTIGATION FUSE SPUR PCB

HARNESS-LOW VOLTAGE

Next: End

PCB FUSE FURTHER INVESTIGATION

FUSE FURTHER INVESTIGATION

Next: End

FAULT CODE A03

KIT - DETECTION - FLOW C/W MAGNET

Next: End

FAULT CODE A03

HEAT EXCHANGER 30KW - SECONDARY

Next: End

FAULT CODE A75-79

MAIN HEAT EXCHANGER - WATER WAYS

Next: End

SHUTS DOWN AT CORRECT TEMP

FAULT CODE A03

Next: End

FAULT CODE A03

THERMOSTAT - OVERHEAT 103 °C

Next: End

FAULT CODE A03 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A77 REOCCURING

CONDENSATE TRAP

Next: End

A77 REOCCURING

CABLE - ELEMENT

Next: End

FAULT CODE A77

CONDENSATE TRAP

Next: End

FAULT CODE A77 2

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A77

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FAULT CODE A77

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A77

PCB-WATER SENSOR

Next: End

FAULT CODE A77 3

HARNESS-LOW VOLTAGE

Next: End

FAULT CODE A77 2

CONDENSATE TRAP

Next: End

FAULT CODE A77

FAULT CODE RESET

Next: End

BURNER DOES NOT IGNITE

INJECTOR

Next: End

CH DOES NOT REACT TO DEMAND

Next: End

CH DOES NOT REACT TO DEMAND

CLOCK

Next: End

DHW TO HOT

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

RADS WARM WITH DHW DEMAND

MOTOR - 3 - WAY VALVE

Next: End

CH DOES NOT REACT TO DEMAND 3

CLOCK

Next: End

CH DOES NOT REACT TO DEMAND 4

CLOCK

Next: End

CH DOES NOT REACT TO DEMAND 2

Next: End

CH DOES NOT REACT TO DEMAND 2

CLOCK

Next: End

EXCESSIVE SYSTEM PRESSURE

PIPE - EXPANSION VESSEL

Next: End

RADS DO NOT HEAT

MOTOR - 3 - WAY VALVE

Next: End

RADS DO NOT HEAT

Next: End

RADS WARM DHW DEMAND

KIT DIVERTER VALVE

Next: End

SELF TEST

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BOILER FIRES WITH NO DEMAND 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BOILER FIRES WITH NO DEMAND

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

FLOW RATE

HEAT EXCHANGER 30KW - SECONDARY

Next: End

BURNER BAFFLES

FLUE

Next: End

BURNER BAFFLES

GASKET - FAN OUTLET

Next: End

BURNER BAFFLES

GASKET - FAN

Next: End

BURNER DOES NOT ESTABLISH

INJECTOR

Next: End

BURNER DOES NOT ESTABLISH

ELECTRODE DETECTION

Next: End

BURNER DOES NOT ESTABLISH 2

PCB - CMP3 - MCU HS MLIMFFLIR HE

Next: End

BURNER BAFFLES 2

FLUE

Next: End

BURNER BAFFLES 2

GASKET - FAN OUTLET

Next: End

BURNER BAFFLES 2

GASKET - FAN

Next: End

BLOCKAGE - LOW WATER PRESSURE SWITCH

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p1134

BLOCKAGE - DIVERTER VALVE MANIFOLD

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p1136

VOLTAGE ABSENT ON TEST 1 (FAN NEUTRAL)

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB (NEUTRAL)

Next: p1195

VOLTAGE PRESENT BUT DOES NOT DROP (FAN NEUTRAL)

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB (NEUTRAL)

Next: !p1197

BOILER GOES TO FLUE OVERHEAT - TEMPERATURE BELOW 90°C

Next: !p1423

FLUE TEMPERATURE EXCEEDS 90°C

Next: !p1800

BLOCKAGE - LOW WATER PRESSURE SWITCH

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p1606

BLOCKAGE - DIVERTER VALVE MANIFOLD

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p1608

VOLTAGE MEASURED 0.9 VDC

CHARACTERISTIC TEST FROM VOLTAGE WATER SENSOR PCB OUTPUT - NO DISPLAY

Next: p1650

VOLTAGE MEASURED 0.6 VDC

CHARACTERISTIC TEST FROM VOLTAGE WATER SENSOR PCB OUTPUT - NO DISPLAY

Next: p1625

VOLTAGE MEASURED 0.4 VDC

CHARACTERISTIC TEST FROM VOLTAGE WATER SENSOR PCB OUTPUT - NO DISPLAY

Next: p1634

VOLTAGE MEASURED 0 VDC

CHARACTERISTIC TEST FROM VOLTAGE WATER SENSOR PCB OUTPUT - NO DISPLAY

Next: p1670

VOLTAGE TEST 2 DOES NOT BEHAVE AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE DHW FLOW SWITCH RETURN AT PCB

Next: p1680

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p169

VOLTAGE TEST 1 MISSING

CHARACTERISTIC TEST FROM VOLTAGE DHW FLOW SWITCH RETURN AT PCB

Next: !p1682

VOLTAGE ABSENT ON TEST 1 (FAN NEUTRAL)

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB (NEUTRAL)

Next: p1693

VOLTAGE PRESENT BUT DOES NOT DROP (FAN NEUTRAL)

CHARACTERISTIC TEST FROM VOLTAGE FAN AT PCB (NEUTRAL)

Next: p2158

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p18

BURNER IGNITES BUT BAFFLES AND/OR FLAME LIFTS OFF

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p911

VOLTAGE NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2025

UNABLE TO ACTIVATE SC MODE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2027

VOLTAGE NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2087

UNABLE TO ACTIVATE SC MODE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2089

RESISTANCE MEASURED OPEN CIRCUIT

CHARACTERISTIC TEST FROM RESISTANCE SOLENOID GAS VALVE

Next: !p2119

RESISTANCE MEASURED SHORT CIRCUIT

CHARACTERISTIC TEST FROM RESISTANCE SOLENOID GAS VALVE

Next: !p2121

BLOCKAGE - LOW WATER PRESSURE SWITCH

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p2169

BLOCKAGE - DIVERTER VALVE MANIFOLD

CHARACTERISTIC TEST FROM INSPECTION SWITCH WATER PRESSURE MANIFOLD

Next: !p2171

VOLTAGE NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2233

UNABLE TO ACTIVATE SC MODE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2235

VOLTAGE NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2270

UNABLE TO ACTIVATE SC MODE

CHARACTERISTIC TEST FROM VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2272

BOILER RESPONDS BUT DOES NOT OPERATE CORRECTLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESPONDS TO A DEMAND (DISPLAY PCB)

Next: !p2382

BOILER DOES NOT RESPOND

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESPONDS TO A DEMAND (DISPLAY PCB)

Next: !p2384

BOILER RESPONDS BUT DOES NOT OPERATE CORRECTLY

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESPONDS TO A DEMAND (DISPLAY PCB)

Next: !p2390

BOILER DOES NOT RESPOND

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESPONDS TO A DEMAND (DISPLAY PCB)

Next: !p2392

DISPLAY TEXT JUMBLED

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p2413

BOILER GOES TO OVERHEAT - TEMPERATURE BELOW 82°C

CHARACTERISTIC TEST FROM RUN BOILER TO MAX TEMP - DOES OVERHEAT OCCUR

Next: !p2486

BOILER FLOW TEMPERATURE EXCEEDS 82°C AND BOILER STILL FIRED

CHARACTERISTIC TEST FROM RUN BOILER TO MAX TEMP - DOES OVERHEAT OCCUR

Next: p2488

FAULT CODE DOES NOT RESET

CHARACTERISTIC TEST FROM RESET APPLIANCE FAULT CODE A77

Next: p2494

FAULT CODE RESETS BUT A77 IS A REOCURRING ISSUE

CHARACTERISTIC TEST FROM RESET APPLIANCE FAULT CODE A77

Next: p2496

DHW COOL, RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p51

DHW COOL, RADIATORS COOL

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2202

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p55

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2241

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p61

BOILER REACHES TEMPERATURE RADIATORS DO NOT HEAT sufficiently

CHARACTERISTIC TEST FROM CH OPERATION

Next: p63

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p687

BOILER AND RADIATOR TEMPERATURE LOW

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1838

PUMP RUNS AND/OR BOILER FIRES - DISPLAY SHOWS FLOW TEMPERATURE BELOW 8 °C

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p758

TRIES TO FIRE WITH NO DEMANDS - DISPLAY SHOWS FLOW TEMPERATURE 8°C & ABOVE

CHARACTERISTIC TEST FROM POWER UP SELF TEST

Next: p764

BURNER IGNITES BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION & ESTABLISH

Next: p853

BURNER DOES NOT CROSS LIGHT CORRECTLY

CHARACTERISTIC TEST FROM OBSERVATION BURNER

Next: p859

BURNER CROSS LIGHTS BUT HAS AN UNSTABLE FLAME PICTURE

CHARACTERISTIC TEST FROM OBSERVATION BURNER

Next: p861

FAN INLET GASKET INSPECTION FAIL

CHARACTERISTIC TEST FROM INSPECTION COMBUSTION GASKETS

Next: !p867

RECUPERATOR OUTLET GASKET INSPECTION FAIL

CHARACTERISTIC TEST FROM INSPECTION COMBUSTION GASKETS

Next: !p869

FAN INLET GASKET INSPECTION FAIL

CHARACTERISTIC TEST FROM INSPECTION COMBUSTION GASKETS

Next: !p921

RECUPERATOR OUTLET GASKET INSPECTION FAIL

CHARACTERISTIC TEST FROM INSPECTION COMBUSTION GASKETS

Next: !p923

25/05/2021 13:29:27 2105_1_50_1 14/07/2021 11:26:54

18/06/2021 10:11:08

Next: End

OBSERVATION SYSTEM PRESSURE

Next: p1126, !f1127

RESISTANCE SWITCH WATER PRESSURE

DISCONNECT LEADS TO THE LOW WATER PRESSURE SWITCH

Next: !p2398, f1131

INSPECTION SWITCH WATER PRESSURE MANIFOLD

DRAIN SYSTEM WATER F

Next: !p1132, ?1133, ?1135

RESET APPLIANCE - FAULT CODE E34

ENSURE NO DEMANDS ARE PRESENT

Next: p2045, f1171

OBSERVATION FAN RUNS DHW DEMAND

DHW TEMPERATURE SET TO MAX

Next: p1176, f1192

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p1179, !f1180

VOLTAGE FAN AT PCB (NEUTRAL)

{GAINPCBACS}
ENSURE NO DEMANDS ARE PRESENT

Next: !p1193, ?1194, ?1196

RESET APPLIANCE - FAULT CODE A03

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p1225, f1224

RESISTANCE OVERHEAT STAT AND HARNESS

GAIN ACCESS TO SMALL PCB ON THE REAR COVER (WATER SENSOR PCB)

Next: p1510, f1242

RESISTANCE OVERHEAT STAT FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS FROM OVERHEAT STAT

Next: !p1287, !f1244

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p1256, !f1257

RESET APPLIANCE - FAULT CODE E99

AFTER POWER OFF, WAIT 15 SECONDS BEFORE POWER ON
ENSURE NO DEMANDS ARE PRESENT

Next: !p1399, !f1393

RESET APPLIANCE - FAULT CODE A75 / A79

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p1401, f1398

RESISTANCE FLUE OVERHEAT STAT AND HARNESS

REMOVE CONNECTOR CN206 FROM THE PCB
GAIN ACCESS TO SMALL PCB ON THE REAR COVER (CONDENSATE PCB)

Next: p1552, f1403

RESISTANCE FLUE OVERHEAT STAT

REMOVE CONNECTORS FROM FLUE OVERHEAT STAT

Next: !p1404, !f1428

BURNER PRESSURE ADJUSTMENT MAX - MIN - FLUE OVERHEAT

ATTACH PRESSURE GAUG

Next: p1830, !f1413

RESET APPLIANCE - FAULT CODE E20

AFTER POWER OFF, WAIT 15 SECONDS BEFORE POWER ON
ENSURE NO DEMANDS ARE PRESENT

Next: p1453, f1454

OBSERVATION FLAME SENSE LEAD DISCONNECTED

{GAINPCBACS}
DISCONNECT FLAME SENSE LEAD FROM CN900 ON THE PCB
(LEAVE IN A SAFE POSITION)

Next: !p1455, !f1456

VOLTAGE WATER SENSOR OUTPUT - PCB

Next: !p1520, f1521

VOLTAGE WATER SENSOR PCB - 12V SUPPLY

Next: !p1802, f1523

VOLTAGE WATER SENSOR PCB - 12V SUPPLY MAIN PCB

Next: !p1526, !f1803

VOLTAGE WATER SENSOR OUTPUT - PCB

Next: !p1562, f1556

VOLTAGE WATER SENSOR PCB - 12V SUPPLY

Next: !p1804, f1558

VOLTAGE WATER SENSOR PCB - 12V SUPPLY MAIN PCB

Next: !p1563, !f1805

OBSERVATION SYSTEM PRESSURE

Next: p1598, !f1599

RESISTANCE SWITCH WATER PRESSURE

DISCONNECT LEADS TO THE LOW WATER PRESSURE SWITCH

Next: !p2399, f1603

INSPECTION SWITCH WATER PRESSURE MANIFOLD

DRAIN SYSTEM WATER F

Next: !p1604, ?1605, ?1607

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p1620, !f1621

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: !p1630, !f1631

RESISTANCE FLUE OVERHEAT STAT

REMOVE CONNECTORS FROM FLUE OVERHEAT STAT

Next: !p1640, !f1641

RESISTANCE OVERHEAT STAT FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS FROM OVERHEAT STAT

Next: !p1647, !f1646

INSPECTION CONDENSATE EXTERNAL PIPE

Next: !p1653, !f1654

RESISTANCE CONDENSATE SENSOR

REMOVE FAN ASSEMBLY

Next: !p1659, !f1660

VOLTAGE WATER SENSOR PCB - 12V SUPPLY

Next: !p1673, f1674

VOLTAGE WATER SENSOR PCB - 12V SUPPLY MAIN PCB

Next: !p1675, !f1676

VOLTAGE DHW FLOW SWITCH RETURN AT PCB

{GAINPCBACS}

Next: p1690, ?1679, ?1681

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}

Next: p230, f231

BURNER PRESSURE ADJUSTMENT MAX - MIN

ATTACH PRESSURE GAUG

Next: p1826, !f1827

OBSERVATION CANCEL MAXIMUM OUTPUT MODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p1876, !f1877

RESET APPLIANCE FAULT CODE T5

ENSURE NO DEMANDS ARE PRESENT

Next: !p1874, !f1875

INSPECTION PIPE COMPENSATION

Next: p2193, !f2003

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2408, !f2007

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2012, !f2013

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2018, f2019

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2407, !f2021

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p2051, !f2064

BYPASS EXTERNAL CONTROLS - FIRES NO DEMAND

{GAINPCBACS}
LINK OUT EXTERNAL CONTROLS (WIRE LINK)
ENSURE NO DEMANDS ARE PRESENT

Next: !p2069, !f2070

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2074, !f2075

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2080, f2081

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2409, !f2083

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2094, !f2093

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2097, f2098

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2403, !f2100

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2105, !f2104

VOLTAGE GAS VALVE AT PCB - MAIN SOLENOID

{GAINPCBACS}

Next: p2108, !f2109

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2401, !f2113

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2124, !f2123

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2127, f2128

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2404, !f2130

INSPECTION WATER INGRESS PCB - WIRING CONNECTIONS

GAIN ACCESS TO PCB AND ALL WIRING CONNECTIONS

Next: p2146, !f2145

OBSERVATION SYSTEM PRESSURE

Next: p2163, !f2164

INSPECTION SWITCH WATER PRESSURE MANIFOLD

DRAIN SYSTEM WATER F

Next: !p2167, ?2168, ?2170

DISCONNECT AIR PRESSURE TUBE

REMOVE TUBE TO AIR PRESSURE SWITCH
REMOVE LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: p2174, !f2175

CH POWER CIRCUIT ADJUSTMENT

{GAINPCBACS}
CH T

Next: !p2187, !f2188

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET T

Next: !p2214, f2215

INSPECTION RECUPERATOR HEAT EXCHANGER

DRAIN PRIMARY CIRCUIT OF WATER
REMOVE FLOW AND RETURN PIPES TO RECUPERATOR HEAT EXCHANGER

Next: !p2216, !f2217

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2220, !f2221

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2226, f2227

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2406, !f2229

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET T

Next: !p2247, f2248

INSPECTION RECUPERATOR HEAT EXCHANGER

DRAIN PRIMARY CIRCUIT OF WATER
REMOVE FLOW AND RETURN PIPES TO RECUPERATOR HEAT EXCHANGER

Next: !p2249, !f2250

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p2257, !f2258

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2263, f2264

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2405, !f2266

INSPECTION PIPE COMPENSATION

Next: p2277, !f2278

RESISTANCE GAS VALVE MODULATION COIL

REMOVE LEADS TO GAS VALVE MODULATION COIL

Next: !p2402, !f2282

RESISTANCE SWITCH AIR PRESSURE AND HARNESS

REMOVE CONNECTOR CN206 FROM THE PCB

Next: p2296, f2288

RESISTANCE SWITCH AIR PRESSURE

DISCONNECT LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: !p2289, f2290

DISCONNECT AIR PRESSURE TUBE

REMOVE TUBE TO AIR PRESSURE SWITCH
REMOVE LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: p2291, !f2292

RESISTANCE OVERHEAT STAT AND HARNESS

GAIN ACCESS TO SMALL PCB ON THE REAR COVER (WATER SENSOR PCB)

Next: p2300, f2301

RESISTANCE OVERHEAT STAT FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS FROM OVERHEAT STAT

Next: p2302, !f2303

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p2308, !f2309

PRESSURE DIFFERENTIAL - EXHAUST / AIR INTAKE

ENSURE COMBUSTION CO

Next: p1794, f237

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: !p2312, !f2313

RESISTANCE SWITCH AIR PRESSURE

DISCONNECT LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: !p2316, f2317

DISCONNECT AIR PRESSURE TUBE

REMOVE TUBE TO AIR PRESSURE SWITCH
REMOVE LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: p2318, !f2319

INSPECTION EEPROM MODULE

Next: p2330, !f2328

RESISTANCE THERMISTOR DHW AND HARNESS

REMOVE CONNECTOR CN201 FROM THE PCB

Next: p2339, f2335

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: !p2336, !f2337

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR CN201 FROM THE PCB

Next: p2348, f2344

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p2345, !f2346

VOLTAGE SOCKET AND SEE

{GAINPCBACS}

Next: p2355, !f2353

INSPECTION EEPROM MODULE

Next: p2359, !f2360

VOLTAGE MAINS POWER INPUT AT PCB

{GAINPCBACS}

Next: p2373, f2368

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p2369, f2370

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p239, !f240

FUSE FURTHER INVESTIGATION FUSED SPUR

THE INFORMATION PROV

Next: !p2371, !f2372

FUSE FURTHER INVESTIGATION PCB FUSES

THE INFORMATION PROV

Next: !p2375, !f2376

OBSERVATION BOILER RESPONDS TO A DEMAND (MAIN PCB)

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: !p2380, ?2381, ?2383

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p2395, !f2396

ADJUSTMENT DIP SWITCHES

Next: p2422, !f2425

ADJUSTMENT DIP SWITCHES

Next: p2428, !f2429

ADJUSTMENT DIP SWITCHES

Next: p2434, !f2435

ADJUSTMENT DIP SWITCHES

Next: p2439, !f2440

INSPECTION DIVERTER VALVE ACTUATOR - FUSE FURTHER INVESTIGATION

REMOVE DIVERTER VALV

Next: p2450, !f2467

RESISTANCE DIVERTER VALVE ACTUATOR

REMOVE DIVERTER VALVE ACTUATOR AND DISCONNECT ELECTRICAL CONNECTOR

Next: !p2453, !f2454

RESISTANCE PUMP

REMOVE ELECTRICAL CONNECTOR TO PUMP ASSEMBLY
GAIN ACCESS TO PUMP ELECTRICAL CONNECTIONS

Next: !p2457, !f2458

RESISTANCE FAN ASSEMBLY - FUSE FURTHER INVESTIGATION

REMOVE LEFT HAND SIDE PANEL
REMOVE ELECTRICAL CONNECTIONS TO FAN ASSEMBLY

Next: !p2461, !f2462

INSPECTION DHW FLOW VALVE

ISOLATE COLD FEED TO

Next: !p2470, !f2471

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET T

Next: !p2477, f2478

INSPECTION RECUPERATOR HEAT EXCHANGER

DRAIN PRIMARY CIRCUIT OF WATER
REMOVE FLOW AND RETURN PIPES TO RECUPERATOR HEAT EXCHANGER

Next: !p2479, !f2480

RESET APPLIANCE FAULT CODE A77

ENSURE NO DEMANDS ARE PRESENT

Next: p2492, ?2493, ?2495

INSPECTION CONDENSATE EXTERNAL PIPE

Next: !p2499, !f2500

INSPECTION CONDENSATE EXTERNAL PIPE

Next: !p2505, !f2506

RESISTANCE CONDENSATE SENSOR

REMOVE FAN ASSEMBLY

Next: !p2511, !f2512

VOLTAGE WATER SENSOR OUTPUT - PCB

Next: !p2515, f2516

VOLTAGE WATER SENSOR PCB - 12V SUPPLY

Next: !p2517, f2518

VOLTAGE WATER SENSOR PCB - 12V SUPPLY MAIN PCB

Next: !p2519, !f2520

INSPECTION CONDENSATE EXTERNAL PIPE

Next: !p2523, !f2524

INSPECTION EXTERNAL CONTROLS FITTED

{GAINPCBACS}

Next: p638, f639

BYPASS INTERNAL CLOCK/PROGRAMMER

REMOVE CONNECTOR CN200 FROM THE PCB (LEAVE IN A SAFE POSITION)

Next: !p686, !f684

BYPASS INTERNAL CLOCK/PROGRAMMER

REMOVE CONNECTOR CN200 FROM THE PCB (LEAVE IN A SAFE POSITION)

Next: !p642, !f643

VOLTAGE ACTUATOR AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR
AND MAKE SAFE

Next: p652, !f653

BYPASS INTERNAL CLOCK/PROGRAMMER

REMOVE CONNECTOR CN200 FROM THE PCB (LEAVE IN A SAFE POSITION)

Next: !p690, !f691

BYPASS INTERNAL CLOCK/PROGRAMMER

REMOVE CONNECTOR CN200 FROM THE PCB (LEAVE IN A SAFE POSITION)

Next: !p694, !f695

VOLTAGE ACTUATOR AT PCB - CH

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR FROM THE DIVERTER VALVE ACTUATOR
AND MAKE SAFE

Next: p713, !f714

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p145, !f146

DISCONNECT EXTERNAL CONTROLS

REMOVE WIRES / LINK FROM EXTERNAL CONTROLS TERMINAL CONNECTOR AND MAKE SAFE

Next: p779, f2068

OBSERVATION DHW ISOLATION VALVE

Next: p795, !f796

VOLTAGE DETECTION ELECTRODE AT PCB

REMOVE CONNECTOR CN900 (DETECTION ELECTRODE LEAD) FROM THE PCB
ENSURE NO DEMANDS ARE PRESENT

Next: !p888, !f889

VOLTAGE MAINS POWER INPUT AT FUSES

{GAINPCBACS}

Next: p2377, f2365

RESISTANCE SWITCH WATER PRESSURE AND HARNESS

REMOVE CONNECTOR CN203 FROM THE PCB

Next: !p1128, f1129

PRESSURE DIFFERENTIAL - EXHAUST / AIR INTAKE

ENSURE COMBUSTION CO

Next: p1833, f1178

INSPECTION FAN ASSEMBLY

REMOVE LEFT HAND SIDE PANEL
REMOVE FAN ASSEMBLY

Next: p1181, !f1182

INSPECTION FLUE

Next: p1183, !f1184

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p1185, !f1186

INSPECTION RESTRICTOR

GAIN ACCESS TO EXHAUST MANIFOLD

Next: p1187, !f1188

INSPECTION RECUPERATOR FLUEWAYS

DRAIN BOILER PRIMARY SYSTEM WATER
REMOVE RECUPERATOR FROM APPLIANCE

Next: !p1189, !f1190

VOLTAGE FAN AT PCB (LIVE)

Next: p1198, !f1199

RESISTANCE FAN ASSEMBLY

REMOVE LEFT HAND SIDE PANEL
DISCONNECT FAN LEADS

Next: !p1200, !f1201

OBSERVATION SYSTEM PRESSURE

Next: p1247, !f1248

OBSERVATION PUMP RUNNING

DHW TEMPERATURE SET TO MAX

Next: p1249, f1255

PUMP LIMPET

Next: p2468, !f1252

RESISTANCE HARNESS PUMP

REMOVE THE CONNECTOR FROM THE PUMP ASSEMBLY AND CN302 FROM THE PCB

Next: !p1258, !f1259

OBSERVATION SYSTEM PRESSURE

Next: p1406, !f1407

PUMP LIMPET

Next: p1410, !f1409

CONFIRM BURNER PRESSURE MAXIMUM & MINIMUM

ENSURE HOT WATER TEM

Next: p1418, f1411

RUN BOILER TO MAX TEMP - DOES FAULT CODE A75 / A79 OCCUR

CH TEMPERATURE CONTR

Next: !p1837, ?1422, ?1424

RESISTANCE HARNESS PUMP

REMOVE THE CONNECTOR FROM THE PUMP ASSEMBLY AND CN302 FROM THE PCB

Next: !p147, !f148

OBSERVATION GAS VALVE PASSING

ATTACH FGA (PRESSURE OPTION) TO GAS VALVE BURNER PRESSURE TEST POINT

Next: p1470, !f1879

VOLTAGE GAS VALVE - BURNER SHUTS DOWN

{GAINPCBACS}

Next: !p1878, !f1882

VOLTAGE WATER SENSOR PCB OUTPUT - MAIN PCB

{GAINPCBACS}

Next: !p1527, f1516

VOLTAGE WATER SENSOR PCB OUTPUT - MAIN PCB

{GAINPCBACS}

Next: !p1561, f1554

RESISTANCE SWITCH WATER PRESSURE AND HARNESS

REMOVE CONNECTOR CN203 FROM THE PCB

Next: p1609, f1601

VOLTAGE WATER SENSOR PCB OUTPUT - NO DISPLAY

{GAINPCBACS}

Next: p1617, ?1622, ?1624, ?1633, ?1648

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR CN201 FROM THE PCB

Next: p1627, f1619

RESISTANCE OVERHEAT STAT AND HARNESS

GAIN ACCESS TO SMALL PCB ON THE REAR COVER (WATER SENSOR PCB)

Next: !p1644, f1643

RESISTANCE THERMISTOR DHW AND HARNESS - NO DISPLAY

REMOVE CONNECTOR CN201 FROM THE PCB

Next: !p1632, f1629

RESISTANCE FLUE OVERHEAT STAT AND HARNESS

REMOVE CONNECTOR CN206 FROM THE PCB
GAIN ACCESS TO SMALL PCB ON THE REAR COVER (CONDENSATE PCB)

Next: !p1639, f1638

INSPECTION CONDENSATE TRAP & HOSE

NOTE.
TAKE

Next: p1651, f1652

INSPECTION RECUPERATOR - BACKED UP

REMOVE FAN ASSEMBLY<

Next: p1655, !f1656

RESISTANCE SENSOR CONDENSATE AND HARNESS

REMOVE 8 WAY CONNECTOR FROM WATER SENSOR PCB

Next: !p1669, f1658

VOLTAGE WATER SENSOR OUTPUT - PCB

Next: !p1671, f1672

VOLTAGE DHW FLOW SWITCH SEND AT PCB

Next: p1683, !f1684

RESISTANCE HARNESS DHW FLOW SWITCH

REMOVE CONNECTORS CN203 FROM THE PCB AND FROM THE DHW FLOW SENSOR

Next: p1685, !f2400

INSPECTION DHW FLOW VALVE

ISOLATE COLD FEED TO

Next: !p1687, !f1688

OBSERVATION SPARKING PRESENT

Next: p492, f175

VOLTAGE FAN AT PCB (NEUTRAL)

{GAINPCBACS}
ENSURE NO DEMANDS ARE PRESENT

Next: !p1691, ?1692, ?1694

VOLTAGE FAN AT PCB (LIVE)

Next: p1717, !f1718

RESISTANCE FAN ASSEMBLY

REMOVE LEFT HAND SIDE PANEL
DISCONNECT FAN LEADS

Next: !p1719, !f1720

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p2042, !f1796

FAULT CODES

Next: !p19, !f983

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p1813, !f1808

INSPECTION FLUE

Next: p1815, !f1814

INSPECTION RESTRICTOR

GAIN ACCESS TO EXHAUST MANIFOLD

Next: p1816, !f1817

INSPECTION RECUPERATOR FLUEWAYS

DRAIN BOILER PRIMARY SYSTEM WATER
REMOVE RECUPERATOR FROM APPLIANCE

Next: !p1818, !f1819

PRESSURE GAS VALVE BURNER - ADJUSTED CORRECTLY - BAFFLES

THE MAXIMUM AND/OR M

Next: !p1828, !f1829

PRESSURE GAS VALVE - ADJUSTED CORRECTLY - A75 - A79 FAULT CODE

THE MAXIMUM AND/OR M

Next: !p1831, !f1832

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p2039, !f1835

INSPECTION CH TEMPERATURE CONTROL KNOB

GAIN ACCESS TO PCB

Next: p2182, !f1846

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2004, f2005

VOLTAGE GAS VALVE MODULATION COIL - DHW

ADJUST DHW FLOW RATE

Next: !p2008, !f2009

INSPECTION PIPE COMPENSATION

Next: p2014, !f2015

BURNER PRESSURE ADJUSTMENT MAX - MIN

ATTACH PRESSURE GAUG

Next: p2016, f2017

PRESSURE GAS VALVE BURNER - ADJUSTED CORRECTLY

THE MAXIMUM AND/OR M

Next: !p2028, !f2029

VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2022, ?2024, ?2026

RESISTANCE HARNESS AIR PRESSURE SWITCH

REMOVE LEADS FROM AIR PRESSURE SWITCH (MAKE A NOTE OF THEIR LOCATION)
REMOVE CN206 FROM THE PCB

Next: !p2040, !f2041

RESISTANCE HARNESS AIR PRESSURE SWITCH

REMOVE LEADS FROM AIR PRESSURE SWITCH (MAKE A NOTE OF THEIR LOCATION)
REMOVE CN206 FROM THE PCB

Next: !p2043, !f2044

PRESSURE DIFFERENTIAL - EXHAUST / AIR INTAKE

ENSURE COMBUSTION CO

Next: p2046, f2050

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: p2048, !f2049

AIR PRESSURE SWITCH PROVING

DISCONNECT LEADS AND TUBE FROM THE AIR PRESSURE SWITCH
(MAKE A NOTE OF THEIR CONNECTIONS)

Next: !p2065, !f2066

INSPECTION FAN ASSEMBLY

REMOVE LEFT HAND SIDE PANEL
REMOVE FAN ASSEMBLY

Next: p2053, !f2054

INSPECTION FLUE

Next: p2055, !f2056

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p2057, !f2058

INSPECTION RESTRICTOR

GAIN ACCESS TO EXHAUST MANIFOLD

Next: p2059, !f2060

INSPECTION RECUPERATOR FLUEWAYS

DRAIN BOILER PRIMARY SYSTEM WATER
REMOVE RECUPERATOR FROM APPLIANCE

Next: !p2061, !f2062

INSPECTION PIPE COMPENSATION

Next: p2076, !f2077

BURNER PRESSURE ADJUSTMENT MAX - MIN

ATTACH PRESSURE GAUG

Next: p2078, f2079

PRESSURE GAS VALVE BURNER - ADJUSTED CORRECTLY - CH

THE MAXIMUM AND/OR M

Next: !p2090, !f2091

VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2084, ?2086, ?2088

ADJUSTMENT SOFT - LIGHT IGNITION GAS PRESSURE

DISCONNECT THE DETEC

Next: !p2095, f2096

VOLTAGE GAS VALVE MODULATION COIL

SET SOFT LIGHT POTENTIOMETER TO ITS MID POSITION

Next: !p2101, !f2102

ADJUSTMENT SOFT - LIGHT IGNITION GAS PRESSURE

DISCONNECT THE DETEC

Next: !p2106, f2107

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2110, f2111

VOLTAGE GAS VALVE MODULATION COIL

SET SOFT LIGHT POTENTIOMETER TO ITS MID POSITION

Next: p2114, !f2115

RESISTANCE SOLENOID GAS VALVE

REMOVE SPARK GENERATOR FROM GAS VALVE

Next: !p2116, ?2118, ?2120

ADJUSTMENT SOFT - LIGHT IGNITION GAS PRESSURE

DISCONNECT THE DETEC

Next: !p2125, f2126

VOLTAGE GAS VALVE MODULATION COIL

SET SOFT LIGHT POTENTIOMETER TO ITS MID POSITION

Next: !p2131, !f2132

INSPECTION EEPROM MODULE

Next: p2153, !f2147

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2149, !f2150

OBSERVATION DIP SWITCH PCB

Next: p2148, f2438

OBSERVATION DIP SWITCH PCB

Next: p2160, f2418

RESISTANCE SWITCH WATER PRESSURE AND HARNESS

REMOVE CONNECTOR CN203 FROM THE PCB

Next: p2161, f2162

RESISTANCE SWITCH AIR PRESSURE

DISCONNECT LEADS TO THE AIR PRESSURE SWITCH (NOTE THEIR LOCATIONS)

Next: p2172, f2173

RESISTANCE SWITCH WATER PRESSURE

DISCONNECT LEADS TO THE LOW WATER PRESSURE SWITCH

Next: !p2397, f2166

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: p2178, !f2179

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: !p2176, !f2177

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: !p2180, !f2181

OBSERVATION DIP SWITCH PCB

Next: p2184, f2427

OBSERVATION MAXIMUM HEATING CIRCUIT POWER

CH TEMPERATURE CONTROL SET TO MAX
ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p2185, f2186

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p2189, !f2190

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: p2002, !f2201

OBSERVATION SYSTEM PRESSURE

Next: p2203, !f2240

INSPECTION DHW TEMPERATURE CONTROL KNOB

GAIN ACCESS TO PCB

Next: p2204, !f2205

PUMP LIMPET

Next: p2206, !f2207

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: p2208, !f2209

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: p2210, !f2211

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET

Next: p2212, f2213

CONFIRM BURNER PRESSURE MAXIMUM & MINIMUM

ENSURE HOT WATER TEM

Next: p2218, f2219

INSPECTION BURNER INJECTOR

REMOVE BURNER ASSEMBLY

Next: !p2238, !f2239

INSPECTION PIPE COMPENSATION

Next: p2222, !f2223

BURNER PRESSURE ADJUSTMENT MAX - MIN

ATTACH PRESSURE GAUG

Next: p2224, f2225

PRESSURE GAS VALVE BURNER - ADJUSTED CORRECTLY

THE MAXIMUM AND/OR M

Next: !p2236, !f2237

VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2230, ?2232, ?2234

OBSERVATION SYSTEM PRESSURE

Next: p2242, !f2285

PUMP LIMPET

Next: p2243, !f2244

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET

Next: p2245, f2246

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: p2251, !f2252

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: p2253, !f2254

CONFIRM BURNER PRESSURE MAXIMUM & MINIMUM

ENSURE HOT WATER TEM

Next: p2255, f2256

BURNER PRESSURE MODULATION - DHW

ADJUST DHW FLOW RATE

Next: !p2275, f2276

INSPECTION PIPE COMPENSATION

Next: p2259, !f2260

BURNER PRESSURE ADJUSTMENT MAX - MIN

ATTACH PRESSURE GAUG

Next: p2261, f2262

PRESSURE GAS VALVE BURNER - ADJUSTED CORRECTLY

THE MAXIMUM AND/OR M

Next: !p2273, !f2274

VOLTAGE GAS VALVE MODULATION COIL - MAX

Next: !p2267, ?2269, ?2271

RESISTANCE GAS VALVE MODULATION COIL AND HARNESS

REMOVE CONNECTOR CN203

Next: p2279, f2280

VOLTAGE GAS VALVE MODULATION COIL - DHW

ADJUST DHW FLOW RATE

Next: !p2283, !f2284

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: !p2293, !f2294

RESET APPLIANCE FAULT CODE E33

ENSURE NO DEMANDS ARE PRESENT

Next: !p2297, !f2298

INSPECTION ELECTRODES

GAIN ACCESS TO ELECTRODE ASSEMBLY

Next: p232, !f233

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR CN201 FROM THE PCB

Next: p2306, f2307

RESISTANCE OVERHEAT STAT FLUE

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLUE OVERHEAT STAT

Next: !p2304, !f2305

RESISTANCE THERMISTOR DHW AND HARNESS

REMOVE CONNECTOR CN201 FROM THE PCB

Next: p2310, f2311

RESISTANCE SWITCH AIR PRESSURE AND HARNESS

REMOVE CONNECTOR CN206 FROM THE PCB

Next: p2323, f2315

INSPECTION AIR PRESSURE TUBES

REMOVE LEFT HAND SIDE PANEL

Next: !p2320, !f2321

RESISTANCE ELECTRODES SPARK

GAIN ACCESS TO SPARK ELECTRODES
REMOVE ELECTRODE LEADS FROM SPARK GENERATOR

Next: !p234, !f235

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2324, !f2325

RESET APPLIANCE FAULT CODE A90

ENSURE NO DEMANDS ARE PRESENT

Next: !p2331, !f2332

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2340, !f2341

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2349, !f2350

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2356, !f2357

OBSERVATION DIP SWITCH PCB

Next: p2361, f2433

RESET APPLIANCE FAULT CODE

ENSURE NO DEMANDS ARE PRESENT

Next: !p2362, !f2363

RESISTANCE FUSES PCB

REMOVE BOTH FUSES FROM PCB

Next: !p2393, f2374

VOLTAGE DISPLAY AT MAIN PCB

Next: p2378, f2379

RESISTANCE CABLE DISPLAY

REMOVE RIBBON CABLE BETWEEN THE DISPLAY & MAIN PCBS

Next: p2385, !f2386

OBSERVATION BOILER RESPONDS TO A DEMAND (DISPLAY PCB)

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: !p2387, ?2389, ?2391

INSPECTION FAN ASSEMBLY

REMOVE LEFT HAND SIDE PANEL
REMOVE FAN ASSEMBLY

Next: p1806, !f242

INSPECTION EEPROM MODULE

Next: p2414, !f2415

RESET APPLIANCE - DISPLAY JUMBLED

ENSURE NO DEMANDS ARE PRESENT

Next: !p2416, !f2417

DIP SWITCHES SET CORRECTLY - FAN

THE PCB DIP SWITCH S

Next: !p2423, !f2426

DIP SWITCHES SET CORRECTLY - CH TEMPERATURE LOW

THE PCB DIP SWITCH S

Next: !p2430, !f2431

DIP SWITCHES SET CORRECTLY - FAULT CODE E08 - E09

THE PCB DIP SWITCH S

Next: !p2436, !f2437

DIP SWITCHES SET CORRECTLY - FAULT CODE E32

THE PCB DIP SWITCH S

Next: !p2441, !f2442

RESISTANCE DIVERTER VALVE ACTUATOR AND HARNESS

REMOVE CONNECTOR CN303 FROM THE PCB

Next: p2451, f2452

RESISTANCE PUMP AND HARNESS

REMOVE CONNECTOR CN302 FROM THE PCB

Next: p2455, f2456

RESISTANCE FAN ASSEMBLY AND HARNESS

REMOVE CONNECTOR CN302 FROM THE PCB

Next: p2459, f2460

RESISTANCE GAS VALVE

REMOVE SPARK GENERATOR FROM GAS VALVE

Next: p2463, !f2464

RESISTANCE SPARK GENERATOR

REMOVE CONNECTOR CN302 FROM THE PCB

Next: !p2465, !f2466

OBSERVATION DHW END OF DEMAND RECOGNISED

PRE-HEAT SWITCHED OFF (TURN COMFORT SWITCH TO E POSITION)

Next: p2472, f2469

OBSERVATION PUMP OVERRUN

PRE-HEAT SWITCHED OFF (TURN COMFORT SWITCH TO E POSITION)

Next: p2473, !f2474

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - DHW

DHW TEMPERATURE SET

Next: p2475, f2476

TEMPERATURE DIFFERENTIAL FLOW AND RETURN - CH

CH TEMPERATURE SET T

Next: p2481, !f2482

RUN BOILER TO MAX TEMP - DOES OVERHEAT OCCUR

ATTACH TEMPERATURE CLAMP TO PRIMARY HEAT EXCHANGER
FLOW PIPE AS ILLUSTRATED

Next: !p2483, ?2485, ?2487

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p2489, !f2490

INSPECTION CONDENSATE TRAP & HOSE

NOTE.
TAKE

Next: p2521, f2522

INSPECTION CONDENSATE TRAP & HOSE

NOTE.
TAKE

Next: p2503, f2504

INSPECTION CONDENSATE TRAP & HOSE

NOTE.
TAKE

Next: p2497, f2498

INSPECTION RECUPERATOR - BACKED UP

REMOVE FAN ASSEMBLY<

Next: !p2501, !f2502

INSPECTION RECUPERATOR - BACKED UP

REMOVE FAN ASSEMBLY<

Next: p2507, !f2508

RESISTANCE SENSOR CONDENSATE AND HARNESS

REMOVE 8 WAY CONNECTOR FROM WATER SENSOR PCB

Next: p2509, f2510

VOLTAGE WATER SENSOR PCB OUTPUT - MAIN PCB

{GAINPCBACS}

Next: !p2513, f2514

INSPECTION RECUPERATOR - BACKED UP

REMOVE FAN ASSEMBLY<

Next: !p2525, !f2526

PRESSURE GAS VALVE SOFT - LIGHT

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p286, f2103

OBSERVATION ELECTRODE SPARK POSITION

GAIN ACCESS TO THE COMBUSTION CHAMBER

Next: p293, !f294

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p568, !f296

INSPECTION PIPE COMPENSATION

Next: p285, !f514

OBSERVATION DIVERTER VALVE ACTUATOR - DHW

REMOVE DIVERTER VALV

Next: !p723, f651

RESISTANCE THERMISTOR DHW

REMOVE LEADS TO DHW THERMISTOR

Next: p646, !f647

INSPECTION BURNER ASSEMBLY

GAIN ACCESS TO BURNER ASSEMBLY

Next: !p569, !f570

INSPECTION EXPANSION VESSEL PRESSURE

DISCHARGE PRIMARY SYSTEM WATER

Next: !p696, !f697

OBSERVATION SYSTEM PRESSURE

Next: p702, !f703

BYPASS EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p640, f641

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p648, !f649

RESISTANCE HARNESS ACTUATOR

REMOVE CONNECTOR CN303 FROM THE PCB AND ELECTRICAL CONNECTOR TO THE DIVERTER VALVE ACTUATOR

Next: !p654, !f655

INSPECTION EXTERNAL CONTROLS FITTED

{GAINPCBACS}

Next: p688, f689

BYPASS EXTERNAL CONTROLS

{GAINPCBACS}
DISC

Next: !p692, f693

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p708, !f705

OBSERVATION DIVERTER VALVE ACTUATOR - CH

REMOVE DIVERTER VALV

Next: p724, f707

TEMPERATURE DIFFERENTIAL INTERNAL BYPASS

ENSURE RADIATORS ARE

Next: !p717, !f718

PUMP LIMPET

Next: p704, !f712

RESISTANCE HARNESS ACTUATOR

REMOVE CONNECTOR CN303 FROM THE PCB AND ELECTRICAL CONNECTOR TO THE DIVERTER VALVE ACTUATOR

Next: !p715, !f716

INSPECTION DIVERTER VALVE SPINDLE

REMOVE DIVERTER VALVE ACTUATOR

Next: p706, !f728

TEMPERATURE FLOW - FROST PROTECTION

REMOVE LEFT HAND SID

Next: p759, !f762

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p760, !f761

OBSERVATION DEMAND ILLUMINATED

PRE-HEAT SWITCHED OFF (TURN COMFORT SWITCH TO E POSITION)
ENSURE NO DEMANDS ARE PRESENT

Next: p771, f766

OBSERVATION ISOLATE COLD FEED TO BOILER

ISOLATE DHW COLD FEED

Next: p772, !f773

OBSERVATION REMOVE DHW FLOW SWITCH

REMOVE DHW FLOW SENS

Next: p787, !f793

RESISTANCE THERMISTOR FLOW

REMOVE LEFT HAND SIDE PANEL
REMOVE LEADS TO FLOW THERMISTOR

Next: !p781, !f782

OBSERVATION DISCONNECT DHW FLOW SWITCH

REMOVE ELECTRICAL CONNECTOR FROM DHW FLOW SENSOR (LEAVE IN A SAFE PLACE)

Next: !p788, !f792

OBSERVATION COLD WATER SUPPLY

Next: p797, !f798

INSPECTION FLOW VALVE ASSEMBLY DHW

ISOLATE COLD FEED TO

Next: !p799, !f1478

INSPECTION PIPE COMPENSATION

Next: p854, !f855

OBSERVATION BURNER

Next: p856, ?858, ?860

INSPECTION ELECTRODE DETECTION

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p884, !f885

PRESSURE GAS VALVE SOFT - LIGHT

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: p870, f2092

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p862, !f863

INSPECTION COMBUSTION GASKETS

GAIN ACCESS TO COMBUSTION CHAMBER

Next: !p864, ?866, ?868

INSPECTION BURNER ASSEMBLY

GAIN ACCESS TO BURNER ASSEMBLY

Next: !p882, !f883

VOLTAGE ELECTRODE DETECTION

ENSURE NO DEMANDS ARE PRESENT
GAIN ACCESS TO DETECTION ELECTRODE

Next: p886, f887

PRESSURE GAS VALVE SOFT - LIGHT

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE OUTLET TEST POINT

Next: !p890, f2122

CONFIRM BURNER PRESSURE MAXIMUM & MINIMUM

ENSURE HOT WATER TEM

Next: p915, f1825

INSPECTION FLUEWAYS MAIN HEAT EXCHANGER

GAIN ACCESS TO COMBUSTION CHAMBER

Next: p916, !f917

INSPECTION COMBUSTION GASKETS

GAIN ACCESS TO COMBUSTION CHAMBER

Next: !p918, ?920, ?922

System Information

Total Tests: 841

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control

XSol Diagnostic System - Generated from extracted test data