XSol Diagnostic System

SIME FRIENDLY, SUPER FORMAT AND SUPER MK2 (BLUE CONTROL BOX)

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &1386, !f2

OBSERVATION LED ILLUMINATED

SELECTOR SWITCH TO DHW AND CH POSITION
ENSURE NO DEMANDS

Next: &895, f1388

DHW FLOW RATE

Next: &119, f87

OBSERVATION PUMP RUNS WITH DHW DEMAND

TURN ON THE HOT TAP WITH A FLOW RATE OF 3 L/MIN

Next: &206, f1958

OBSERVATION FAN RUNS

ENSURE APPLIANCE IS COOL

Next: &226, f209

OBSERVATION BURNER IGNITION AND ESTABLISH

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE

Next: &287, ?227, ?229, ?231, ?233

PRESSURE BURNER MINIMUM

ATTACH U GAUGE TO BURNER PRESSURE TEST POINT
REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE

Next: &307, ?288, ?290

OPERATION DHW OUTPUT

BOILER DHW THERMOSTAT SET TO MAX
BOTH WIRES CONNECTED TO MODUREG

Next: &1305, ?311, ?313, ?315, ?1067

OPERATION DHW MODULATION

BOILER DHW THERMOSTA

Next: &408, f437

OPERATION CH

CH THERMOSTAT SET TO MAX

Next: &nff, ?444, ?446, ?448, ?477

HEADER FOR LOCKOUT INVESTIGATION

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1758

OBSERVATION BOILER STANDBY

ENSURE NO DEMANDS

Next: &86, f1456

PRESSURE BURNER MAXIMUM

ATTACH U GAUGE TO BU

Next: &317, f1306

DIAGNOSTIC CHOICE

Next: &3, !f1387

HEADER FOR FUSE INVESTIGATION

Next: &nff, f1812

QUICK ACCESS DATA AND INFORMATION

Next: &nff, !f1873

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f1872

HEADER FOR SENSOR RESISTANCE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1913

HEADER FOR GAS VALVE SOLENOID RESISTANCE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1917

HEADER FOR GAS VALVE MODUREG RESISTANCE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1935

HEADER FOR PUMP VOLTAGE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1946

HEADER FOR FAN VOLTAGE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1947

HEADER FOR GAS VALVE VOLTAGE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1948

HEADER FOR MODUREG VOLTAGE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f1949

HEADER FOR FAN RESISTANCE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f2009

HEADER FOR PUMP RESISTANCE (QADAI)

INTENTIONALLY BLANK - HEADER FOR QADAI TEST

Next: &nff, f2013

BLANK FOR UNABLE TO SET MINIMUM 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

MINIMUM EXCESSIVE

GAS VALVE VENT TUBE

Next: End

MINIMUM TOO HIGH

GAS VALVE VENT TUBE

Next: End

NO MODULATION

TEMPERATURE SENSOR ELMWOOD

Next: End

INCORRECT MAXIMUM BAFFLING

GAS VALVE VENT TUBE

Next: End

LOW 6 BAFFLING

INLET PRESSURE

Next: End

NOT ENOUGH VOLTAGE TO MODUREG BAFFLING

PCB CONTROL

Next: End

NOT GOING TO MAXIMUM PRESSURE BAFFLING

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR MAXIMUM ADJUSTMENT BAFFLING

Z DIRECTION CHOICE OR CONTINUE

Next: End

DAMAGED RESTRICTED OR BLOCKED AT MAX

MAIN BURNER ASSEMBLY

Next: End

FLUEWAYS BLOCKED AT MAX

PRIMARY HEAT EXCHANGER

Next: End

RESTRICTED BLOCKED OR SPLIT

AIR PRESSURE SWITCH TUBE

Next: End

NOT MAKING AT CORRECT PRESSURE

SWITCH - AIR PRESSURE

Next: End

SPARK GAP INCORRECT

ELECTRODE - IGNITION

Next: End

INCORRECT MAXIMUM 2

GAS VALVE VENT TUBE

Next: End

NO MAX BP

TEMPERATURE SENSOR ELMWOOD

Next: End

TYPE DIAG PROCEDURE

DIRECTION CHOICE OR CONTINUE

Next: End

NOT SWITCHING ON

KNOB 40MM DIA

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE (MAINS)

Next: End

BLANK FOR PCB INVESTIGATION 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

FUSE F1

Next: End

OUT OF RANGE

TEMPERATURE SENSOR ELMWOOD

Next: End

OPEN CIRCUIT

THERMOSTAT 85 DEG C LIMIT C/W AUTO RESET ELMWOOD

Next: End

NO MAINS SUPPLY TO PCB

SWITCH ROTARY

Next: End

GIVING DEMAND INCORRECTLY

Next: End

CORRECTLY ACTIVATED

FROST PROTECTION

Next: End

ACTIVATED INCORRECTLY

THERMOSTAT 16 DEG C FROST ELMWOOD

Next: End

FIRING WITH NO DEMAND

PCB CONTROL

Next: End

FILTER DHW

FILTER

Next: End

STUCK MADE

SWITCH - AIR PRESSURE

Next: End

RESTRICTED OR BLOCKED

AIR PRESSURE SWITCH TUBE

Next: End

OPEN CIRCUIT DEMAND TO IGNITION CONTROL BOX

CABLE CONNECTOR SIT (J2)

Next: End

OPEN CIRCUIT PERMANENT SUPPLY

CABLE CONNECTOR SIT (J2)

Next: End

STOPPING DEMAND

TEMPERATURE SENSOR ELMWOOD

Next: End

OPEN CIRCUIT 2

THERMOSTAT 85 DEG C LIMIT C/W AUTO RESET ELMWOOD

Next: End

RESTRICTED OR BLOCKED

NIPPLE M6 - VENTURI PRESSURE

Next: End

RESTRICTED OR BLOCKED

FLUE

Next: End

FAILING LIMPET - WEAK OR SLOW

PUMP MYSON

Next: End

INCORRECT MAXIMUM

GAS VALVE VENT TUBE

Next: End

LOW 6

INLET PRESSURE

Next: End

NOT ENOUGH VOLTAGE TO MODUREG

PCB CONTROL

Next: End

NOT GOING TO MAXIMUM PRESSURE

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR MAXIMUM ADJUSTMENT

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAILING LIMPET - WEAK OR SLOW 2

PUMP MYSON

Next: End

INCORRECT MAXIMUM

INLET PRESSURE

Next: End

INCORRECT MAXIMUM

PCB CONTROL

Next: End

INCORRECT MAXIMUM

GAS VALVE - TANDEM - SIT

Next: End

INCORRECT MAXIMUM

Z DIRECTION CHOICE OR CONTINUE

Next: End

NOT SUPPLYING CH

PCB CONTROL

Next: End

NOT SWITCHING

TIMER

Next: End

NOT SWITCHING CH

SWITCH ROTARY

Next: End

NOT GIVING CH DEMAND 3 2

Next: End

NOT SUPPLYING CH 2

PCB CONTROL

Next: End

NOT SWITCHING 2

TIMER

Next: End

NOT SWITCHING CH 2

SWITCH ROTARY

Next: End

NOT GIVING CH DEMAND 3 3

Next: End

NOT SUPPLYING CH 3

PCB CONTROL

Next: End

NOT SWITCHING 3

TIMER

Next: End

NOT SWITCHING CH 3

SWITCH ROTARY

Next: End

OPENING WHEN SHOULD NOT OR STUCK OPEN

MANIFOLD CH FLOW/RETURN

Next: End

NO POWER TO PUMP FAULT CODE

PCB CONTROL

Next: End

FAILING LIMPET WEAK OR SLOW OVERHEAT

PUMP MYSON

Next: End

OVERHEAT

TEMPERATURE SENSOR ELMWOOD

Next: End

SHUT TOO MUCH

Next: End

RESTRICTED OR BLOCKED OVERHEAT

PRIMARY HEAT EXCHANGER

Next: End

INCORRECT DIFFERENTIAL

Next: End

CAUSING FUSE TO BLOW

PUMP MYSON

Next: End

CAUSING FUSE TO BLOW

FAN ASSEMBLY

Next: End

IGNITION CONTROL BOX BLOWING FUSE

CONTROL BOX SIT 503 (BLOWING FUSE)

Next: End

FAULTY STUCK MADE

DIVERTER VALVE ASSEMBLY

Next: End

STICKING MADE

MICROSWITCH - FLOWMETER

Next: End

MOTOR SHORTED

TIMER

Next: End

BLANK FOR LITE DIAGNOSTIC

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

RESISTANCE WRONG NOT OPENING PROPERLY 2

MODULATION COIL

Next: End

RESISTANCE WRONG NOT OPENING PROPERLY

MODULATION COIL

Next: End

RESISTANCE WRONG NOT OPENING PROPERLY 3

MODULATION COIL

Next: End

FIRING WITH NO DEMAND 2

PCB CONTROL

Next: End

SHORTED TO EARTH

THERMOSTAT 85 DEG C LIMIT C/W AUTO RESET ELMWOOD

Next: End

LOCKOUT NOT SHOWING

LOCKOUT LED FAULTY

Next: End

FAULTY ON DIAGNOSTIC READINGS

TEMPERATURE SENSOR ELMWOOD

Next: End

FOR DIAGNOSTIC READINGS

SOLENOID

Next: End

BLOWING FUSE

SOLENOID

Next: End

BLOWING FUSE

MODULATION COIL

Next: End

FOR DIAGNOSTIC READINGS

MODULATION COIL

Next: End

FOR DIAGNOSTIC READINGS

CONTROL BOX - SIT 503 (BLUE)

Next: End

NOT ACTIVATING FLOW SWITCH

DIVERTER VALVE ASSEMBLY

Next: End

NOT MAKING

MICROSWITCH - FLOWMETER

Next: End

PUMP NOT RUNNING OUT OF RANGE

TEMPERATURE SENSOR ELMWOOD

Next: End

NO DHW DEMAND

KNOB 40MM DIA

Next: End

OPEN CIRCUIT SUPPLIES TO IGNITION CONTROL BOX

CABLE CONNECTOR SIT (J2)

Next: End

OPEN CIRCUIT TO RESET SWITCH

CABLE CONNECTOR SIT (J2)

Next: End

RESET FUNCTION NOT WORKING

SWITCH ROTARY

Next: End

OPEN CIRCUIT OR HIGH RESISTANCE

SOLENOID

Next: End

RESTRICTED OR FAULTY SEALS

FLUE

Next: End

BLANK FOR CASE OFF

Z DIRECTION CHOICE OR CONTINUE

Next: End

FOR QUICK ACCESS DATA AND INFORMATION

FAN ASSEMBLY

Next: End

FOR QUICK ACCESS DATA AND INFORMATION

PUMP MYSON

Next: End

NO POWER TO PUMP QADAI

PCB CONTROL

Next: End

NO VOLTAGE TO MODUREG QADAI

PCB CONTROL

Next: End

NO POWER TO FAN QADAI

CONTROL BOX - SIT 503 (BLUE)

Next: End

LOW

INLET PRESSURE

Next: End

LOW 2

INLET PRESSURE

Next: End

SPARK GAP OR ALIGNTMENT INCORRECT

ELECTRODE - IGNITION

Next: End

RESTRICTED OR BLOCKED

MAIN BURNER ASSEMBLY

Next: End

NOT RECTIFYING

ELECTRODE - IONISATION

Next: End

DAMAGED RESTRICTED OR BLOCKED

MAIN BURNER ASSEMBLY

Next: End

FLUEWAYS BLOCKED

PRIMARY HEAT EXCHANGER

Next: End

LOW 5

INLET PRESSURE

Next: End

READING HOT WHEN COLD 2

TEMPERATURE SENSOR ELMWOOD

Next: End

NOT TURING POT ON PCB

KNOB 40MM DIA

Next: End

READING HOT WHEN COLD 3

TEMPERATURE SENSOR ELMWOOD

Next: End

NOT TURNING POT ON PCB 2

KNOB 40MM DIA

Next: End

NOT GIVING CH DEMAND 3

Next: End

FLAT

EXPANSION VESSEL

Next: End

NOT TURNING POT ON PCB

KNOB 40MM DIA

Next: End

READING HOT WHEN COLD 4

TEMPERATURE SENSOR ELMWOOD

Next: End

FAILING LIMPET WEAK OR SLOW 3

PUMP MYSON

Next: End

OPEN TOO MUCH

Next: End

KEEPING DIVERTER IN WRONG POSITION

DRIPPING TAP OR LEAK ON PIPEWORK

Next: End

OPEN CIRCUIT

THERMOSTAT 100 DEG C SAFETY

Next: End

GAS VALVE SOLENOID DAMAGED PCB

IGNITION CONTROL BOX AND SOLENOID

Next: End

CLOSED

BALL COCK 3/4 IN X 22MM

Next: End

POOR DHW FLOW

BALL COCK 1/2IN X 15MM

Next: End

INADEQUATE WATER SUPPLY

WATER SUPPLY TO PREMISES

Next: End

UNABLE TO SET MINIMUM PRESSURE NOT IGNITING

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR MINIMUM MODUREG ADJUSTMENT

Z DIRECTION CHOICE OR CONTINUE

Next: End

UNABLE TO SET MINIMUM

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR UNABLE TO SET MINIMUM

Z DIRECTION CHOICE OR CONTINUE

Next: End

UNABLE TO SET MINIMUM PRESSURE 2

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR MINIMUM ADJUSTMENT NOT IGNITING

Z DIRECTION CHOICE OR CONTINUE

Next: End

SPARKING NOT IGNITING

GAS VALVE VENT TUBE

Next: End

LOW 3

INLET PRESSURE

Next: End

UNABLE TO SET MINIMUM PRESSURE ESTABLISH

GAS VALVE - TANDEM - SIT

Next: End

BLANK FOR MINIMUM MODUREG ADJUSTMENT NOT ESTABLISHING

Z DIRECTION CHOICE OR CONTINUE

Next: End

IGNITING NOT ESTABLISHING

GAS VALVE VENT TUBE

Next: End

IGNITES BUT BAFFLES

GAS VALVE VENT TUBE

Next: End

LOW 4

INLET PRESSURE

Next: End

UNABLE TO SET MINIMUM 2

GAS VALVE - TANDEM - SIT

Next: End

IGNITES BUT BAFFLES

GAS VALVE MINIMUM ADJUSTMENT

Next: End

MODUREG BAFFLING

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

POOR HOT WATER BAFFLING

GAS VALVE MAXIMUM ADJUSTMENT

Next: End

RESTRICTED OR FAULTY SEALS AT MAX

FLUE

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION MAINS FUSE

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR PCB INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION FUSE F1

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO RESPONSE FROM BOILER

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

NO LED NO OPERATION

PCB CONTROL

Next: End

OPEN CIRCUIT

CONNECTOR CABLE 2 POLE FEMALE (J1)

Next: End

OPEN CIRCUIT TO PCB

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

SHORTED TOGETHER

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

DHW SIDE RESTRICTED

HEAT EXCHANGER - DHW

Next: End

NO POWER TO FAN

CONTROL BOX - SIT 503 (BLUE)

Next: End

NO DEMAND TO IGNITION CONTROL BOX

PCB CONTROL

Next: End

OPEN CIRCUIT 2

CONNECTOR CABLE 2 POLE FEMALE (J1)

Next: End

BLOCKED KEEPING APS MADE

NIPPLE M6 - VENTURI PRESSURE

Next: End

OPEN CIRCUIT TO SAFETY THERMOSTAT

CABLE CONNECTOR SIT (J2)

Next: End

RUNNING BUT SLOW OR DIRTY

FAN ASSEMBLY

Next: End

RESTRICTED OR BLOCKED

HEAT EXCHANGER - DHW

Next: End

RESTRICTED OR BLOCKED 2

PRIMARY HEAT EXCHANGER

Next: End

RESTRICTED OR BLOCKED 2

INJECTOR MAIN BURNER

Next: End

MODUREG

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

POOR HOT WATER

GAS VALVE MAXIMUM ADJUSTMENT

Next: End

HOT AND COLD DHW - MODULATION

PCB CONTROL

Next: End

RESTRICTED OR BLOCKED 2

HEAT EXCHANGER - DHW

Next: End

RESTRICTED OR BLOCKED 3

PRIMARY HEAT EXCHANGER

Next: End

INCORRECT MAXIMUM

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

INCORRECT MAXIMUM

GAS VALVE MAXIMUM ADJUSTMENT

Next: End

NOT MODULATING

PCB CONTROL

Next: End

NOT RECOGNISING CH DEMAND

PCB CONTROL

Next: End

CH WIRING FAULTY

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

NOT RECOGNISING CH DEMAND 2

PCB CONTROL

Next: End

CH WIRING FAULTY 2

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

NOT RECOGNISING CH DEMAND 3

PCB CONTROL

Next: End

CH WIRING FAULTY 3

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

POOR CIRCULATION CAUSING INTEGRAL BYPASS TO OPEN

Next: End

NOT RUNNING OVERHEAT

PUMP MYSON

Next: End

NO POWER TO PUMP FAULT CODE

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

RESTRICTED OR BLOCKED OVERHEAT

HEAT EXCHANGER - DHW

Next: End

FAULT CODE

OVERHEAT INFORMATION PAGE

Next: End

NO POWER TO GAS VALVE

CONTROL BOX - SIT 503 (BLUE)

Next: End

TRIPPING EARLY

THERMOSTAT 100 DEG C SAFETY

Next: End

CAUSING FUSE TO BLOW

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

CAUSING FUSE TO BLOW

CABLE CONNECTOR SIT (J2)

Next: End

TEMPERATURE CONTROL FAULTY

PCB CONTROL

Next: End

PCB BLOWING FUSE

Next: End

NOT RECTIFYING

CONTROL BOX - SIT 503 (BLUE)

Next: End

NOT SPARKING

CONTROL BOX - SIT 503 (BLUE)

Next: End

WATER FLOW WHEN SHOULDNT BE

DRIPPING TAP OR LEAK ON PIPEWORK

Next: End

DHW MICROSWITCH SECTION SHORTED

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

APS HARNESS SHORTED

CABLE CONNECTOR SIT (J2)

Next: End

APS WIRING OPEN CIRCUIT

CABLE CONNECTOR SIT (J2)

Next: End

NO PERMANENT SUPPLY TO IGNITION CONTROL BOX

PCB CONTROL

Next: End

SHORTED TO EARTH

CONNECTOR CABLE 2 POLE FEMALE (J1)

Next: End

TRIPPING EARLY

THERMOSTAT 85 DEG C LIMIT C/W AUTO RESET ELMWOOD

Next: End

THERMISTOR PRIMARY

RESULT AS EXPECTED

Next: End

GAS VALVE SOLENOID

RESULT AS EXPECTED

Next: End

MODUREG SECTION BLOWING FUSE

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

MODUREG

RESULT AS EXPECTED

Next: End

FOR DIAGNOSTIC READINGS

GAS VALVE - TANDEM - SIT

Next: End

NOT RUNNING

PUMP MYSON

Next: End

NO POWER TO PUMP

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

DHW MICROSWITCH SECTION OPEN CIRCUIT

CONNECTOR CABLE 11 POLE FEMALE (J3)

Next: End

NO POWER TO PUMP WITH DEMAND

PCB CONTROL

Next: End

OPEN CIRCUIT TO PRIMARY THERMISTOR

CONNECTOR CABLE 6 POLE FEMALE (J5)

Next: End

STUCK IN LOCKOUT

CONTROL BOX - SIT 503 (BLUE)

Next: End

NO IGNITION PRESSURE

GAS VALVE - TANDEM - SIT

Next: End

RESTRICTED OR BLOCKED 3

INJECTOR MAIN BURNER

Next: End

BLOCKED OR FAULTY

HYDROMETER

Next: End

LOW CAUSING POOR DHW

SYSTEM PRESSURE

Next: End

BLOCKED OR FAULTY 2

HYDROMETER

Next: End

LOW CAUSING HOT AND COLD DHW

SYSTEM PRESSURE

Next: End

BLOCKED OR FAULTY 3

HYDROMETER

Next: End

OVERHEAT FAULT CODE

SYSTEM PRESSURE

Next: End

BLOCKED OR FAULTY 4

HYDROMETER

Next: End

POOR HEATING

SYSTEM PRESSURE

Next: End

AIR PRESSURE SWITCH

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE

RESULT AS EXPECTED

Next: End

MODUREG 2

RESULT AS EXPECTED

Next: End

PUMP

RESULT AS EXPECTED

Next: End

PCB VOLTAGE TO FAN

RESULT AS EXPECTED

Next: End

SEIZED OR BURNT OUT

FAN ASSEMBLY

Next: End

OPEN CIRCUIT FAN SECTION

CABLE CONNECTOR SIT (J2)

Next: End

RESTRICTED OR BLOCKED

INJECTOR MAIN BURNER

Next: End

PASSING TO RADIATORS

DIVERTER VALVE ASSEMBLY

Next: End

BLOCKED

PIPE EXPANSION VESSEL

Next: End

NOT CONTROLING CH TEMP CORRECTLY

PCB CONTROL

Next: End

STUCK IN DHW POSITION

DIVERTER VALVE ASSEMBLY

Next: End

POOR CIRCULATION

Next: End

NOT IGNITING

GAS VALVE MINIMUM ADJUSTMENT

Next: End

MINIMUM SET TOO HIGH

GAS VALVE MINIMUM ADJUSTMENT

Next: End

MINIMUM TOO LOW

GAS VALVE MINIMUM ADJUSTMENT

Next: End

IGNITING BUT NOT ESTABLISHING

GAS VALVE MINIMUM ADJUSTMENT

Next: End

BURNER BAFFLES DURING DHW OPERATION

CHARACTERISTIC TEST FROM OPERATION DHW OUTPUT

Next: p1069

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: !p1612

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: p1701

TEMPERATURE DIFFERENTIAL STILL EXCESSIVE

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: !p1648

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: p1690

LOCKOUT WILL NOT RESET

CHARACTERISTIC TEST FROM OBSERVATION BOILER RESET AND IGNITION

Next: p1973

APPLIANCE HEATS BEYOND 80 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: !p1828

LOCKOUT OCCURS BEFORE 80 DEGREES REACHED

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: !p1810

APPLIANCE SHUTS DOWN BEFORE 80 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN APPLIANCE TO MAX TEMP

Next: !p1909

PRESSURE GAUGE DOES NOT RESPOND TO INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p1989

SYSTEM PRESSURE UNSATISFACTORY/AIR IN APPLIANCE AND SYSTEM

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p1991

PRESSURE GAUGE DOES NOT RESPOND TO INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p1994

SYSTEM PRESSURE UNSATISFACTORY/AIR IN APPLIANCE AND SYSTEM

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p1996

PRESSURE GAUGE DOES NOT RESPOND TO INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p1999

SYSTEM PRESSURE UNSATISFACTORY/AIR IN APPLIANCE AND SYSTEM

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p2001

PRESSURE GAUGE DOES NOT RESPOND TO INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p2004

SYSTEM PRESSURE UNSATISFACTORY/AIR IN APPLIANCE AND SYSTEM

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND AIR

Next: !p2006

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p228

SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p1172

BURNER IGNITES SMOOTHLY BUT DOES NOT ESTABLISH (SPARKING CONTINUES)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p232

BURNER IGNITES BUT BAFFLES OUT

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p294

NO PRESSURE MEASURED

CHARACTERISTIC TEST FROM PRESSURE BURNER IGNITION

Next: p257

PRESSURE PRESENT BUT INCORRECT

CHARACTERISTIC TEST FROM PRESSURE BURNER IGNITION

Next: p974

PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM PRESSURE BURNER MINIMUM

Next: p1002

PRESSURE LOW

CHARACTERISTIC TEST FROM PRESSURE BURNER MINIMUM

Next: p308

TEMP RISE UNSATISFACTORY RADS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW OUTPUT

Next: !p312

TEMP RISE UNSATISFACTORY RADS DO NOT BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW OUTPUT

Next: p526

DHW RUNS HOT AND COLD

CHARACTERISTIC TEST FROM OPERATION DHW OUTPUT

Next: p557

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION CH

Next: p450

EXCESSIVE SYSTEM PRESSURE RISE AS TEMPERATURE INCREASES

CHARACTERISTIC TEST FROM OPERATION CH

Next: p447

BOILER AND RADIATOR TEMPERATURE REMAINS LOW

CHARACTERISTIC TEST FROM OPERATION CH

Next: p449

BOILER UP TO TEMPERATURE BUT RADIATORS DO NOT HEAT SUFFICIENTLY OR REMAIN COLD

CHARACTERISTIC TEST FROM OPERATION CH

Next: p583

25/11/2022 10:01:10 2103_4_50_3 28/12/2022 08:00:55

12/12/2022 10:20:19

Next: End

INSPECTION VENT TUBE GAS VALVE

Next: p1072, !f1073

RESISTANCE MODUREG

REMOVE BOTH ORANGE WIRES FROM THE MODUREG

Next: !p1078, !f1874

RESISTANCE APS AND HARNESS USING TEST KIT

REMOVE THE 12 PIN CO

Next: p1189, f1186

RESISTANCE APS USING TEST KIT

DISCONNECT LEADS FRO

Next: !p1856, !f1188

INSPECTION VENT TUBE GAS VALVE

Next: p1321, !f1308

INSPECTION SELECTOR SWITCH

GAIN ACCESS TO PCB

Next: p1389, !f1390

VOLTAGE MAINS INTO SELECTOR SWITCH

Next: p1453, f1394

RESISTANCE FUSE MAIN

GAIN ACCESS TO THE INCOMING MAINS FUSE

Next: !p1395, f1396

FUSE FURTHER INVESTIGATION MAIN

Next: !p1397, !f1398

FURTHER INVESTIGATION FUSE F1

Next: !p1421, !f1422

RESISTANCE THERMISTOR PRIMARY AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: p1445, f1446

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1447, !f1448

RESISTANCE LIMIT THERMOSTAT

REMOVE BOTH WIRES FROM THE LIMIT THERMOSTAT

Next: !p1451, !f1452

OBSERVATION DISCONNECT EXTERNAL CONTROLS OR LINK

REMOVE CONNECTOR J4 FROM THE PCB AND MAKE SAFE

Next: p1457, !f1458

OBSERVATION ISOLATE WATER SUPPLY TO BOILER

ISOLATE THE DHW SUPPLY TO THE APPLIANCE

Next: !p1844, !f1845

VOLTAGE PERMANENT AT IGNITION CONTROL BOX

Next: p1561, f1572

RESISTANCE HARNESS CONTROL PCB TO IGNITION CONTROL BOX

REMOVE THE 12 PIN CONNECTOR FROM THE IGNITION CONTROL BOX
REMOVE CONNECTOR J2 FROM THE PCB

Next: p1577, !f1574

RESISTANCE AIR PRESSURE SWITCH AT REST

REMOVE THE WIRES FROM THE AIR PRESSURE SWITCH NOTING THEIR LOCATIONS

Next: !p1855, f1567

RESISTANCE APS TUBE DISCONNECTED

DISCONNECT AIR PRESSURE PIPES FROM APS

Next: p1568, !f1569

RESISTANCE HARNESS CONTROL PCB TO IGNITION CONTROL BOX

REMOVE THE 12 PIN CONNECTOR FROM THE IGNITION CONTROL BOX
REMOVE CONNECTOR J2 FROM THE PCB

Next: !p1859, !f1576

RESISTANCE LIMIT THERMOSTAT

REMOVE BOTH WIRES FROM THE LIMIT THERMOSTAT

Next: !p1583, !f1584

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE C

Next: !p1610, ?1611, ?1613

INSPECTION VENT TUBE GAS VALVE

Next: p1627, !f1628

RESISTANCE MODUREG

REMOVE BOTH ORANGE WIRES FROM THE MODUREG

Next: !p1633, !f1876

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE C

Next: !p1646, ?1647, ?1649

RESISTANCE MODUREG

REMOVE BOTH ORANGE WIRES FROM THE MODUREG

Next: !p1666, !f1875

VOLTAGE CH FROM PCB

Next: p1684, !f1685

VOLTAGE CH FROM PCB

Next: p1695, !f1696

VOLTAGE CH FROM PCB

Next: p1706, !f1707

INSPECTION INTEGRAL BYPASS

APPLIANCE DRAINED AN

Next: !p1713, !f1714

OBSERVATION BOILER RESET AND IGNITION

Next: p1759, ?1760

VOLTAGE PUMP AT PUMP

REMOVE THE COVER FROM THE PUMP ASSEMBLY
RUN THE HOT TAP AT 3 L/MIN

Next: !p1778, f1779

VOLTAGE PUMP AT PCB

{GAINPCBACS}
RUN HOT WATER TAP AT 3 L/MIN

Next: !p1780, !f1781

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE C

Next: !p1790, !f1791

RESISTANCE PUMP AND HARNESS AND TO EARTH

REMOVE CONNECTOR J3 FROM THE PCB

Next: p1813, f1814

RESISTANCE PUMP AND TO EARTH

REMOVE THE COVER FROM THE PUMP ASSEMBLY
REMOVE THE WIRES FROM THE PUMP ASSEMBLY

Next: !p1815, !f1816

RESISTANCE FAN AND TO EARTH

REMOVE THE WIRES FROM THE FAN ASSEMBLY

Next: !p1819, !f1820

INSPECTION DIVERTER VALVE SPINDLE (NO DEMAND)

Next: p1848, f1460

RESISTANCE LIMIT THERMOSTAT TO EARTH

REMOVE BOTH WIRES FROM THE LIMIT THERMOSTAT

Next: !p1884, !f1896

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1915, !f1914

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p1918, !f1919

RESISTANCE MODUREG

REMOVE BOTH ORANGE WIRES FROM THE MODUREG

Next: !p1932, !f1933

RESISTANCE MODUREG

REMOVE BOTH ORANGE WIRES FROM THE MODUREG

Next: !p1936, !f1937

VOLTAGE PUMP AT PUMP

REMOVE THE COVER FROM THE PUMP ASSEMBLY
RUN THE HOT TAP AT 3 L/MIN

Next: !p2018, !f2019

VOLTAGE FAN AT FAN

Next: !p2023, !f2021

VOLTAGE TO GAS VALVE AT IGNITION CONTROL BOX

REMOVE THE CONTROL B

Next: !p1954, !f1955

VOLTAGE MODUREG

HOT WATER TAP ON AND FULLY OPEN

Next: !p2017, !f2020

VOLTAGE PUMP AT PUMP

REMOVE THE COVER FROM THE PUMP ASSEMBLY
RUN THE HOT TAP AT 3 L/MIN

Next: !p1959, f1960

VOLTAGE PUMP AT PCB

{GAINPCBACS}
RUN HOT WATER TAP AT 3 L/MIN

Next: !p1961, f1962

INSPECTION DIVERTER VALVE SPINDLE (DEMAND)

SET FLOW RATE TO 3 LITRES A MINUTE

Next: p1963, !f1964

RESISTANCE DHW MICROSWITCH

REMOVE THE MICROSWIT

Next: !p1967, !f1968

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1971, !f1972

RESISTANCE FAN AND TO EARTH

REMOVE THE WIRES FROM THE FAN ASSEMBLY

Next: !p2010, !f2011

RESISTANCE PUMP AND TO EARTH

REMOVE THE COVER FROM THE PUMP ASSEMBLY
REMOVE THE WIRES FROM THE PUMP ASSEMBLY

Next: !p2014, !f2015

VOLTAGE FAN AT FAN

Next: !p210, f211

VOLTAGE FAN AT IGNITION CONTROL BOX

{GAINPCBACS}

Next: !p212, f1549

INSPECTION DHW TEMPERATURE CONTROL KNOB

GAIN ACCESS TO PCB

Next: p1056, !f443

TEMPERATURE HEATING FLOW INCREASE - INTERNAL DHW ISOLATED

ISOLATE COLD WATER S

Next: !p488, !f489

RESISTANCE SAFETY THERMOSTAT AND HARNESS

REMOVE CONNECTOR J2 FROM THE PCB
REMOVE THE 2 PIN CONNECTOR FROM THE IGNITION CONTROL BOX

Next: p777, f778

RESISTANCE SAFETY THERMOSTAT

REMOVE BOTH WIRES FROM THE SAFETY THERMOSTAT

Next: !p1592, !f780

INSPECTION DHW ISOLATION VALVE

Next: p88, !f89

INSPECTION VENT TUBE GAS VALVE

Next: p984, !f991

INSPECTION VENT TUBE GAS VALVE

Next: p995, !f994

INSPECTION VENT TUBE GAS VALVE

Next: p746, !f1008

INSPECTION VENT TUBE GAS VALVE

Next: p742, !f1015

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p1675, !f1058

PRESSURE BURNER MAXIMUM

ATTACH U GAUGE TO BU

Next: p1087, f1071

PRESSURE GAS INLET BURNER ESTABLISHED

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1074, !f1075

RESISTANCE MODUREG AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: p1076, f1077

VOLTAGE MODUREG

HOT WATER TAP ON AND FULLY OPEN

Next: p1080, !f1081

PRESSURE GAS MAXIMUM ADJUSTMENT

ATTACH U GAUGE TO BU

Next: p1082, !f1083

CORRECTION GAS VALVE MAXIMUM

Next: !p1084, !f1085

INSPECTION BURNER ASSEMBLY

GAIN ACCESS TO BURNER ASSEMBLY

Next: p1088, !f1089

INSPECTION PRIMARY HEAT EXCHANGER FLUE WAYS

Next: !p1090, !f1091

OBSERVATION SPARKING OCCUR WITH APS MADE

REMOVE TUBE FROM RIGHT CONNECTOR OF APS

Next: p1178, f1185

INSPECTION AIR PRESSURE TUBE

Next: p1600, !f1180

INSPECTION IGNITION ELECTRODE AND LEAD

REMOVE THE SPARK ELECTRODE LEAD FROM THE IGNITION CONTROL BOX

Next: !p1835, !f1191

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1661, !f1349

VOLTAGE MAINS INTO APPLIANCE AT PCB

{GAINPCBACS}

Next: p1410, f1392

OBSERVATION DOES BOILER RESPOND

Next: p1403, f1444

FURTHER INVESTIGATION LED FAULTY

TESTS SO FAR HAVE PR

Next: !p1408, !f1409

RESISTANCE FUSE F1

REMOVE THE FUSE FROM THE PCB

Next: p1391, f1420

RESISTANCE LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR J1 FROM THE PCB

Next: !p1449, f1450

VOLTAGE MAINS FROM SELECTOR SWITCH

Next: !p1454, !f1455

RESISTANCE DHW MICROSWITCH AND HARNESS (NO DEMAND)

REMOVE CONNECTOR J3 FROM THE PCB

Next: p1887, f1836

RESISTANCE FROST THERMOSTAT AND HARNESS

REMOVE CONNECTOR J3 FROM THE PCB

Next: p1487, !f1494

TEMPERATURE APPLIANCE

Next: p1491, !f1489

RESISTANCE FROST THERMOSTAT

REMOVE BOTH WIRES FROM THE FROST THERMOSTAT

Next: !p1492, !f1493

INSPECTION FILTER

ISOLATE INCOMING WATER SUPPLY TO APPLIANCE

Next: !p1514, !f1497

VOLTAGE IGNITION DEMAND AT IGNITION CONTROL BOX

Next: p1897, f1563

RESISTANCE AIR PRESSURE SWITCH AND HARNESS AT REST

REMOVE THE COVER FROM THE IGNITION CONTROL BOX
REMOVE THE 12 PIN CONNECTOR

Next: !p1564, f1565

INSPECTION AIR PRESSURE TUBE

Next: !p1589, !f1571

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1580, !f1578

RESISTANCE LIMIT THERMOSTAT AND HARNESS

REMOVE CONNECTOR J1 FROM THE PCB

Next: !p1581, f1582

INSPECTION VENTURI

Next: p1601, !f1602

INSPECTION FLUE

Next: !p1603, !f1604

PUMP LIMPET TEST

Next: p1606, !f1607

TEMPERATURE DIFFERENTIAL DHW

FLOW RATE AT HOT TAP

Next: p1608, f1609

PRESSURE BURNER MAXIMUM

ATTACH U GAUGE TO BU

Next: !p1625, f1626

PRESSURE GAS INLET BURNER ESTABLISHED

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1629, !f1630

RESISTANCE MODUREG AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: p1631, f1632

VOLTAGE MODUREG

HOT WATER TAP ON AND FULLY OPEN

Next: p1635, !f1636

PRESSURE GAS MAXIMUM ADJUSTMENT

ATTACH U GAUGE TO BU

Next: p1637, !f1638

CORRECTION GAS VALVE MAXIMUM

Next: !p1639, !f1640

PUMP LIMPET TEST

Next: p1642, !f1643

TEMPERATURE DIFFERENTIAL DHW

FLOW RATE AT HOT TAP

Next: !p1644, f1645

PRESSURE GAS INLET BURNER ESTABLISHED

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1662, !f1663

RESISTANCE MODUREG AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: p1664, f1665

VOLTAGE MODUREG

HOT WATER TAP ON AND FULLY OPEN

Next: p1668, !f1669

PRESSURE GAS MAXIMUM ADJUSTMENT

ATTACH U GAUGE TO BU

Next: p1670, !f1671

CORRECTION GAS VALVE MAXIMUM - PRIMARY TEST

Next: !p1672, !f1673

VOLTAGE CH DEMAND AT PCB

Next: !p1682, f1683

RESISTANCE INTEGRAL TIMER SWITCH

REMOVE THE WIRES FROM TERMINALS 3 AND 4 ON THE INTEGRAL TIMER

Next: p1686, !f1687

RESISTANCE SELECTOR SWITCH CH

REMOVE THE WIRES FROM THE SELECTOR SWITCH NOTING THEIR LOCATIONS
SELECTOR SWITCH IN WINTER MODE

Next: !p1688, !f1689

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE EXTERNAL CONTROLS WIRING FROM THE TERMINALS AT CONNECTOR J4 AND FIT A WIRE LINK

Next: p1691, !f1692

VOLTAGE CH DEMAND AT PCB

Next: !p1693, f1694

RESISTANCE INTEGRAL TIMER SWITCH

REMOVE THE WIRES FROM TERMINALS 3 AND 4 ON THE INTEGRAL TIMER

Next: p1697, !f1698

RESISTANCE SELECTOR SWITCH CH

REMOVE THE WIRES FROM THE SELECTOR SWITCH NOTING THEIR LOCATIONS
SELECTOR SWITCH IN WINTER MODE

Next: !p1699, !f1700

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE EXTERNAL CONTROLS WIRING FROM THE TERMINALS AT CONNECTOR J4 AND FIT A WIRE LINK

Next: p1702, !f1703

VOLTAGE CH DEMAND AT PCB

Next: !p1704, f1705

RESISTANCE INTEGRAL TIMER SWITCH

REMOVE THE WIRES FROM TERMINALS 3 AND 4 ON THE INTEGRAL TIMER

Next: p1708, !f1709

RESISTANCE SELECTOR SWITCH CH

REMOVE THE WIRES FROM THE SELECTOR SWITCH NOTING THEIR LOCATIONS
SELECTOR SWITCH IN WINTER MODE

Next: !p1710, !f1711

INSPECTION SYSTEM PRESSURE AND AIR

Next: p1774, ?1998, ?2000

OBSERVATION PUMP RUNS

Next: p1776, f1777

PUMP LIMPET TEST

Next: p1782, !f1783

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1784, !f1785

EXTERNAL BYPASS

Next: p1786, !f1787

TEMPERATURE DIFFERENTIAL DHW

FLOW RATE AT HOT TAP

Next: p1788, f1789

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE C

Next: p1792, !f1793

OBSERVATION RUN APPLIANCE TO MAX TEMP

BOILER CH THERMOSTAT

Next: !p1794, ?1807, ?1809, ?1908

RESISTANCE FAN AND HARNESS AND TO EARTH

REMOVE THE 12 PIN CONNECTOR FROM THE IGNITION CONTROL BOX

Next: p1817, f1818

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: p1921, !f1920

OBSERVATION DISCONNECT IGNITION CONTROL BOX

REMOVE THE CONNECTOR J2 FROM THE PCB AND MAKE SAFE
REPLACE THE FUSE (CORRECTLY RATED)

Next: !p1829, !f1831

RESISTANCE DHW MICROSWITCH

REMOVE THE MICROSWIT

Next: !p1854, !f1850

RESISTANCE INTEGRAL TIMER MOTOR

REMOVE THE WIRES FROM TERMINALS 1 AND 2 ON THE INTEGRAL TIMER

Next: p1827, !f1869

RESISTANCE LIMIT THERMOSTAT AND HARNESS TO EARTH

REMOVE CONNECTOR J1 FROM THE PCB

Next: p1865, f1883

OBSERVATION FROST THERMOSTAT FITTED

Next: p1472, !f1895

VOLTAGE IGNITION CONTROL BOX LOCKOUT

{GAINPCBACS}

Next: p1562, !f1907

RESISTANCE MODUREG AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: p1877, f1931

RESISTANCE DHW MICROSWITCH AND HARNESS (DEMAND)

REMOVE CONNECTOR J3 FROM THE PCB
TURN HOT WATER TAP ON AT A FLOW RATE OF 3 L/MIN

Next: p1965, f1966

RESISTANCE THERMISTOR PRIMARY AND HARNESS

REMOVE CONNECTOR J5 FROM THE PCB

Next: !p1969, f1970

INSPECTION SELECTOR SWITCH

GAIN ACCESS TO PCB

Next: p1975, !f1974

RESISTANCE HARNESS CONTROL PCB TO IGNITION CONTROL BOX

REMOVE THE 12 PIN CONNECTOR FROM THE IGNITION CONTROL BOX
REMOVE CONNECTOR J2 FROM THE PCB

Next: p1976, !f1977

RESISTANCE HARNESS IGNITION CONTROL BOX TO RESET SWITCH

REMOVE THE 12 PIN CO

Next: p1978, !f1979

RESISTANCE SELECTOR SWITCH RESET FUNCTION

{GAINPCBACS}
REMO

Next: !p1980, !f1981

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p1983, !f1984

INSPECTION FLUE

Next: !p1986, !f1987

PRESSURE BURNER IGNITION

ATTACH U GAUGE TO THE BURNER PRESSURE TEST POINT
REMOVE 1 WIRE FROM MODUREG AND MAKE SAFE

Next: p255, ?256, ?258

PRESSURE BURNER IGNITION

ATTACH U GAUGE TO THE BURNER PRESSURE TEST POINT
REMOVE 1 WIRE FROM MODUREG AND MAKE SAFE

Next: p282, f983

INSPECTION BURNER ASSEMBLY

GAIN ACCESS TO BURNER ASSEMBLY

Next: p293, !f302

INSPECTION SPARK ELECTRODE ALIGNMENT

Next: p272, !f273

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p774, !f265

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p735, !f263

INSPECTION BURNER ASSEMBLY

GAIN ACCESS TO BURNER ASSEMBLY

Next: !p275, !f276

INSPECTION ELECTRODE DETECTION AND LEAD

DISCONNECT THE DETECTION LEAD FROM THE IGNITION CONTROL BOX

Next: !p1833, !f284

INSPECTION PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1985, !f303

PRESSURE BURNER IGNITION

ATTACH U GAUGE TO THE BURNER PRESSURE TEST POINT
REMOVE 1 WIRE FROM MODUREG AND MAKE SAFE

Next: p234, f992

PRESSURE GAS INLET BURNER ESTABLISHED

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p1009, !f310

INSPECTION DHW TEMPERATURE CONTROL KNOB

GAIN ACCESS TO PCB

Next: p333, !f373

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1605, !f343

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: p1641, !f376

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED AND DISCHARGED

Next: !p461, !f462

INSPECTION CH TEMPERATURE CONTROL KNOB

GAIN ACCESS TO PCB

Next: p463, !f464

OBSERVATION LINK EXTERNAL CONTROLS

REMOVE THE EXTERNAL CONTROLS WIRING FROM THE TERMINALS AT CONNECTOR J4 AND FIT A WIRE LINK

Next: p1681, !f452

RESISTANCE THERMISTOR PRIMARY

REMOVE THE CONNECTOR FROM THE PRIMARY THERMISTOR

Next: !p465, !f466

PUMP LIMPET TEST

Next: p483, !f482

TEMPERATURE HEATING FLOW INCREASE - INTERNAL

ATTACH ONE TEMPERATU

Next: p480, f481

TEMPERATURE DIFFERENTIAL FLOW PIPE EXTERNAL AND RETURN

ATTACH 1 TEMPERATURE

Next: !p490, f1712

EXTERNAL BYPASS

Next: p479, !f487

INSPECTION SYSTEM PRESSURE AND AIR

Next: p314, ?1988, ?1990

INSPECTION SYSTEM PRESSURE AND AIR

Next: p374, ?1993, ?1995

INSPECTION SYSTEM PRESSURE AND AIR

Next: p792, ?2003, ?2005

PRESSURE GAS MINIMUM ADJUSTMENT NOT IGNITING

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE
ATTACH U GAUGE TO BURNER PRESSURE TEST POINT

Next: p954, !f955

PRESSURE GAS MINIMUM ADJUSTMENT

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE
ATTACH U GAUGE TO BURNER PRESSURE TEST POINT

Next: p970, !f971

PRESSURE GAS MINIMUM ADJUSTMENT

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE
ATTACH U GAUGE TO BURNER PRESSURE TEST POINT

Next: p966, !f967

VOLTAGE TO GAS VALVE AT IGNITION CONTROL BOX

REMOVE THE CONTROL B

Next: p1982, f776

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p1805, !f782

INSPECTION FLOW AND RETURN ISOLATION VALVES

Next: p478, !f806

OBSERVATION WATER SUPPLY TO PREMISES

TURN ON A COLD WATER TAP

Next: p1496, !f91

CORRECTION GAS VALVE MINIMUM - BURNER NOT IGNITING

Next: !p956, !f957

CORRECTION GAS VALVE MINIMUM - MINIMUM TOO HIGH

Next: !p968, !f969

CORRECTION GAS VALVE MINIMUM - MINIMUM TOO LOW

Next: !p972, !f973

INSPECTION VENT TUBE GAS VALVE

Next: p259, !f982

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p985, !f986

PRESSURE GAS MINIMUM ADJUSTMENT NOT ESTABLISHING

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE
ATTACH U GAUGE TO BURNER PRESSURE TEST POINT

Next: p987, !f988

CORRECTION GAS VALVE MINIMUM - BURNER IGNITES BUT DOES NOT ESTABLISH

Next: !p989, !f990

PRESSURE GAS INLET

ATTACH U GAUGE TO INLET PRESSURE TEST POINT

Next: p996, !f997

PRESSURE GAS MINIMUM ADJUSTMENT

REMOVE 1 WIRE FROM THE MODUREG AND MAKE SAFE
ATTACH U GAUGE TO BURNER PRESSURE TEST POINT

Next: p998, !f999

CORRECTION GAS VALVE MINIMUM - BURNER IGNITES BUT BAFFLES

Next: !p1000, !f1001

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