XSol Diagnostic System

Interactive Test Sequence Navigator

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:

FERROLI OPTIMA 600

G.C. NUMBER 47 267 1

Next: &30, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

MODUREG BALANCE TUBE

{ISOLATEMAINSPOWER}

Next: &nff, !f185

CH PUMP OVERRUN

SELECTOR SWITCH IN CH CONTINUOUS POSITION

Next: &12, !f186

CH BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &13, f184

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO CH CONTINUOUS POSITION

Next: &14, !f183

CH OPERATION

SELECTOR SWITCH IN CH CONTINUOUS POSITION

Next: &15, ?177, ?179, ?181

CH BURNER IGNITION (TIMED)

SELECTOR SWITCH IN CH TIMED POSITION
ENSURE CLOCK IS SET TO AN ON PERIOD

Next: &16, f208

CH HIGH BURNER

{ISOLATEMAINSPOWER}<

Next: &17, f205

CH PUMP RUNS

SELECTOR SWITCH IN CH CONTINUOUS POSITION

Next: &18, f170

DHW BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &19, f165

DHW OPERATION

SELECTOR SWITCH IN DHW POSITION

Next: &20, ?127, ?129, ?131

MAIN BURNER IGNITES

{ISOLATEMAINSPOWER}<

Next: &21, ?119, ?121, ?123, ?125

FLAME FAILURE DEVICE OPERATION

SELECTOR SWITCH IN HOT WATER POSITION

Next: &22, !f227

PILOT IGNITES AND ESTABLISHES

SELECTOR SWITCH TO HOT WATER POSITION

Next: &23, ?57, ?59, ?61, ?63

FAN RUNS HIGH SPEED (DHW DEMAND)

SELECTOR SWITCH IN HOT WATER POSITION

Next: &24, f55

SLOW FAN

SELECTOR SWITCH IN HOT WATER POSITION

Next: &25, f45

BOILER STANDBY

Next: &26, f38

DHW FLOW RATE

Next: &27, f33

SYSTEM CHECKS

GLOBALLY REPLACED

Next: &28, !f265

FERROLI OPTIMA 600

{ISOLATEMAINSPOWER}<

Next: &29, !f31

PILOT IGNITES, BUT DOES NOT ESTABLISH

THERMOSTAT 100 DEGREE C - OVERHEAT CUT OFF

Next: End

PILOT IGNITES, BUT DOES NOT ESTABLISH

THERMOCOUPLE

Next: End

PILOT IGNITES, BUT DOES NOT ESTABLISH

WIRE - ECO SPLIT

Next: End

PILOT IGNITES AND ESTABLISHES, BUT DIES OUT

THERMOCOUPLE

Next: End

PILOT IGNITES AND ESTABLISHES, BUT DIES OUT

GAS VALVE INLET PRESSURE

Next: End

SPARKING, BUT NO IGNITION

ELECTRODE - IGNITION - HONEYWELL (GAP)

Next: End

SPARKING, BUT NO IGNITION

PILOT BURNER INJECTOR

Next: End

SPARKING, BUT NO IGNITION

GAS VALVE INLET PRESSURE

Next: End

BURNER CROSS LIGHTS, BUT PRESSURE STAYS LOW

SENSOR - TEMPERATURE - PHILLIPS

Next: End

MODULATING SOLENOID RESISTANCE

GAS VALVE

Next: End

BURNER CROSS LIGHTS, BUT PRESSURE STAYS LOW

GAS VALVE INLET PRESSURE

Next: End

BURNER FAILS TO LIGHT, PRESSURE ABSENT

SENSOR - TEMPERATURE - PHILLIPS

Next: End

MAIN SOLENOID RESISTANCE

GAS VALVE

Next: End

BURNER FAILS TO LIGHT, PRESSURE ABSENT

GAS VALVE INLET PRESSURE

Next: End

DHW OPERATION

SENSOR - TEMPERATURE - PHILLIPS

Next: End

CH PUMP RUNS

Next: End

CH PUMP RUNS

PCB - MAIN -HONEYWELL

Next: End

SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

MODUREG BALANCE TUBE

TUBE MODULATING BALANCE

Next: End

CH PUMP OVERRUN

PCB - MAIN -HONEYWELL

Next: End

CH BURNER MODULATION

SENSOR - TEMPERATURE - PHILLIPS

Next: End

CH BURNER MODULATION

THERMOSTAT C/W MULTI PLUG - CH

Next: End

NOISY OPERATION (KETTLING)

Next: End

NOISY OPERATION (KETTLING)

PUMP

Next: End

BOILER CYCLES ON AND OFF, BUT SYSTEM REMAINS COLD

Next: End

BOILER CYCLES ON AND OFF, BUT SYSTEM REMAINS COLD

PUMP

Next: End

BOILER HEATS UP, BUT SYSTEM COLD

Next: End

BOILER HEATS UP, BUT SYSTEM COLD

PUMP

Next: End

CH HIGH BURNER

SENSOR - TEMPERATURE - PHILLIPS

Next: End

CH BURNER IGNITION (TIMED)

PROGRAMMER / CLOCK 24HR LCD DIEHL 884

Next: End

CH HIGH BURNER

Next: End

CH HIGH BURNER

SWITCH 3 POSITION SELECTOR

Next: End

BOILER CYCLES ON AND OFF, BUT SYSTEM REMAINS COLD

SENSOR - TEMPERATURE - PHILLIPS

Next: End

BOILER STANDBY

THERMOSTAT - FROST - ELMWOOD

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

FLOW SWITCH 1/2IN - CALEFFI

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

SENSOR - TEMPERATURE - PHILLIPS

Next: End

FLAME FAILURE DEVICE OPERATION

GAS VALVE

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

SENSOR - TEMPERATURE - PHILLIPS

Next: End

DHW OPERATION

INJECTOR 2.1MM - MAIN BURNER - NG

Next: End

DHW BURNER MODULATION

SENSOR - TEMPERATURE - PHILLIPS

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

FLUE

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

GAS VALVE INLET PRESSURE

Next: End

PILOT IGNITES AND ESTABLISHES

ELECTRODE - IGNITION - HONEYWELL

Next: End

SPARKING NOT PRESENT

ELECTRODE - IGNITION - HONEYWELL (GAP)

Next: End

PILOT IGNITES AND ESTABLISHES

WIRE ELECTRODE

Next: End

SYSTEM

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

DHW FLOW RATE

FILTER 1/2IN - INLET - CW

Next: End

DHW FLOW RATE

FLOW LIMITER 11 L/MIN

Next: End

BOILER STANDBY

FLOW SWITCH 1/2IN - CALEFFI

Next: End

BOILER STANDBY

SWITCH 3 POSITION SELECTOR

Next: End

SLOW FAN

FUSE

Next: End

SLOW FAN

Next: End

PILOT IGNITES AND ESTABLISHES

INJECTOR 0.65 DIA - PRESSURE SWITCH

Next: End

PILOT IGNITES AND ESTABLISHES

PIPE 4MM ID X 7MM OD SILICONE

Next: End

PILOT IGNITES AND ESTABLISHES

FLUE

Next: End

PILOT IGNITES AND ESTABLISHES

THERMOSTAT 88 DEGREE C LIMIT - CH - ELMWOOD

Next: End

PILOT IGNITES AND ESTABLISHES

LIMIT THERMOSTAT 70 DEGREE C - DHW - ELMWOOD

Next: End

PILOT IGNITES AND ESTABLISHES

KNOB EXTENSION WHITE

Next: End

PILOT IGNITES AND ESTABLISHES

MICROSWITCH IGNITION

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

INJECTOR 0.65 DIA - PRESSURE SWITCH

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

PIPE 4MM ID X 7MM OD SILICONE

Next: End

PILOT IGNITES AND ESTABLISHES, BUT DIES OUT

GAS VALVE

Next: End

MAIN BURNER IGNITES

INJECTOR 2.1MM - MAIN BURNER - NG

Next: End

DHW NOISY OPERATION (KETTLING)

HEAT EXCHANGER

Next: End

BURNER CROSS LIGHTS, BUT PRESSURE STAYS LOW

PCB - MAIN -HONEYWELL

Next: End

BURNER FAILS TO LIGHT, PRESSURE ABSENT

PCB - MAIN -HONEYWELL

Next: End

INLET PRESSURE

GAS VALVE

Next: End

DHW OPERATION

PCB - MAIN -HONEYWELL

Next: End

DHW BURNER MODULATION

GAS VALVE

Next: End

DHW BURNER MODULATION

PCB - MAIN -HONEYWELL

Next: End

CH PUMP RUNS

SWITCH 3 POSITION SELECTOR

Next: End

CH PUMP RUNS

PUMP

Next: End

CH BURNER MODULATION

PCB - MAIN -HONEYWELL

Next: End

NOISY OPERATION (KETTLING)

HEAT EXCHANGER

Next: End

BOILER CYCLES ON AND OFF, BUT SYSTEM REMAINS COLD

Next: End

BOILER HEATS UP, BUT SYSTEM COLD

Next: End

CH BURNER IGNITION (TIMED)

SWITCH 3 POSITION SELECTOR

Next: End

CH HIGH BURNER

PCB - MAIN -HONEYWELL

Next: End

BOILER STANDBY

PCB - MAIN -HONEYWELL

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

PCB - MAIN -HONEYWELL

Next: End

PILOT IGNITES, BUT DOES NOT ESTABLISH

GAS VALVE

Next: End

SPARKING, BUT NO IGNITION

GAS VALVE

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

PCB - MAIN -HONEYWELL

Next: End

INSUFFICIENT DHW TEMPERATURE

HEAT EXCHANGER

Next: End

DHW OPERATION

GAS VALVE

Next: End

INLET PRESSURE

GAS VALVE

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

GAS VALVE

Next: End

PILOT IGNITES AND ESTABLISHES

TRANSFORMER IGNITION

Next: End

FAN DOES NOT RUN SLOW

J2

Next: End

DHW FLOW RATE

HEAT EXCHANGER

Next: End

SLOW FAN

FAN ASSEMBLY

Next: End

SLOW FAN

PCB - MAIN -HONEYWELL

Next: End

PILOT IGNITES AND ESTABLISHES

PRESSURE SWITCH

Next: End

PILOT IGNITES AND ESTABLISHES

PCB - MAIN -HONEYWELL

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

FAN ASSEMBLY

Next: End

FAN RUNS HIGH SPEED (DHW DEMAND)

PRESSURE SWITCH

Next: End

BURNER CROSS LIGHTS, BUT BURNER DIES OUT

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES

Next: p120

BURNER CROSS LIGHTS, BUT PRESSURE STAYS LOW

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES

Next: p122

BURNER FAILS TO LIGHT, PRESSURE ABSENT

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES

Next: p124

BURNER FAILS TO LIGHT, PRESSURE PRESENT

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES

Next: !p126

INSUFFICIENT DHW TEMPERATURE

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p239

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p130

DHW NOISY OPERATION (KETTLING)

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p132

BOILER HEATS UP, BUT SYSTEM COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p178

BOILER CYCLES ON AND OFF, BUT SYSTEM REMAINS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p180

NOISY OPERATION (KETTLING)

CHARACTERISTIC TEST FROM CH OPERATION

Next: p182

SPARKING NOT PRESENT

CHARACTERISTIC TEST FROM PILOT IGNITES AND ESTABLISHES

Next: p58

PILOT IGNITES, BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM PILOT IGNITES AND ESTABLISHES

Next: p60

PILOT IGNITES AND ESTABLISHES, BUT DIES OUT

CHARACTERISTIC TEST FROM PILOT IGNITES AND ESTABLISHES

Next: p62

SPARKING, BUT NO IGNITION

CHARACTERISTIC TEST FROM PILOT IGNITES AND ESTABLISHES

Next: p64

05/02/2018 09:31:26 1802_1_50_2 06/03/2018 13:34:46

05/02/2018 10:11:59

Next: End

DHW SENSOR RESISTANCE (FULL DEMAND)

{ISOLATEMAINSPOWER}
REMOVE LEADS FROM THE DHW THERMISTOR
ENSURE DHW IS COOL

Next: !p146, !f145

DHW SENSOR RESISTANCE (FULL DEMAND)

{ISOLATEMAINSPOWER}
REMOVE LEADS FROM THE DHW THERMISTOR
ENSURE DHW IS COOL

Next: !p152, !f151

DHW SENSOR MODULATION RESISTANCE

SELECTOR SWITCH TO HOT WATER POSITION

Next: !p163, !f164

DHW MODUREG MODULATION VOLTAGE

SELECTOR SWITCH TO HOT WATER POSITION

Next: !p167, f166

DHW SENSOR MODULATION RESISTANCE

SELECTOR SWITCH TO HOT WATER POSITION

Next: !p169, !f243

SELECTOR SWITCH RESISTANCE (CH 24 HOURS)

{ISOLATEMAINSPOWER}
SELECTOR SWITCH TO CH CONTINUOUS POSITION
REMOVE CONNECTOR X2 FROM PCB

Next: p172, f171

EXTERNAL CONTROL RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE EXTERNAL CONTROLS, IF FITTED, ARE CALLING

Next: !p174, !f173

CH THERMISTOR MODULATION RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE LEADS FROM THE CH THERMISTOR

Next: p187, !f188

CH THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE LEADS FROM THE CH THERMISTOR

Next: p207, !f206

CH TIMER RESISTANCE

{ISOLATEMAINSPOWER}<

Next: !p210, !f209

DHW THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM THE DHW SENSOR

Next: p220, !f223

DHW SENSOR RESISTANCE (FULL DEMAND)

{ISOLATEMAINSPOWER}
REMOVE LEADS FROM THE DHW THERMISTOR
ENSURE DHW IS COOL

Next: !p237, !f238

INSPECTION JP2

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE PCB

Next: !p264, f46

DHW INLET FILTER

{ISOLATEMAINSPOWER}
WATER OFF

Next: p35, !f34

DHW FLOW SWITCH RESISTANCE (OPEN CIRCUIT)

{ISOLATEMAINSPOWER}
ENSURE DHW TAPS ARE OFF

Next: p40, !f39

SLOW FAN VOLTAGE

Next: !p50, f258

FUSE

{ISOLATEMAINSPOWER}

Next: p52, !f51

AIR PRESSURE SWITCH NO AIR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR PLUG R FROM PCB

Next: p88, f87

AIR PRESSURE SWITCH DAMPER

{ISOLATEMAINSPOWER}

Next: p68, !f67

CH LIMIT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p80, !f79

AIR PRESSURE SWITCH DAMPER

{ISOLATEMAINSPOWER}

Next: p90, !f89

THERMOCOUPLE OUTPUT MILLIVOLTAGE

Next: p105, !f104

THERMOCOUPLE INTERRUPTER

{ISOLATEMAINSPOWER}

Next: !p225, !f106

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: !p111, !f110

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: p115, !f114

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: !p226, !f116

DHW GAS VALVE VOLTAGE

SELECTOR SWITCH TO HOT WATER POSITION

Next: p245, f236

DHW FULL MODUREG VOLTAGE

SELECTOR SWITCH IN HOT WATER POSITION

Next: p136, f135

DHW GAS VALVE VOLTAGE

SELECTOR SWITCH TO HOT WATER POSITION

Next: p138, f137

DHW MODUREG MODULATION VOLTAGE

SELECTOR SWITCH TO HOT WATER POSITION

Next: !p242, f160

MODULATING SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM MODUREG SOLENOID.

Next: p148, !f147

MAIN SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM MAIN GAS VALVE SOLENOID.

Next: p154, !f153

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: !p244, !f149

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: !p156, !f155

CH PUMP VOLTAGE

SELECTOR SWITCH TO CH CONTINUOUS POSITION

Next: !p176, !f175

SYSTEM BYPASS

Next: p202, !f201

SYSTEM BYPASS

Next: p196, !f195

SYSTEM BYPASS

Next: p192, !f191

CH POTENTIOMETER RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE PLUG X1 FROM THE PCB

Next: !p190, !f189

PUMP RUN (LIMPET TEST)

Next: !p194, !f193

PUMP RUN (LIMPET TEST)

Next: p198, !f197

CH THERMISTOR OPERATION

{ISOLATEMAINSPOWER}
DISCONNECT THE LEADS FROM THE CH THERMISTOR

Next: !p200, !f215

PUMP RUN (LIMPET TEST)

Next: !p204, !f203

EXTERNAL CONTROL RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE EXTERNAL CONTROLS, IF FITTED, ARE CALLING

Next: p212, !f211

SELECTOR SWITCH RESISTANCE (CH 24 HOURS)

{ISOLATEMAINSPOWER}
SELECTOR SWITCH TO CH CONTINUOUS POSITION
REMOVE CONNECTOR X2 FROM PCB

Next: !p214, !f213

FROST THERMOSTAT

{ISOLATEMAINSPOWER}<

Next: !p217, !f218

DHW FLOW SWITCH RESISTANCE (SHORT CIRCUIT)

{ISOLATEMAINSPOWER}

Next: !p224, !f222

GAS RATE

Next: !p240, !f241

INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT ON THE GAS VALVE

Next: p246, !f249

FLUE

Next: !p247, !f248

SPARK ELECTRODE

{ISOLATEMAINSPOWER}

Next: p253, !f252

ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: p254, !f255

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}

Next: !p256, !f257

DHW RESTRICTOR

{ISOLATEMAINSPOWER}
WATER OFF

Next: !p37, !f36

SELECTOR SWITCH RESISTANCE

{ISOLATEMAINSPOWER}
SELECTOR SWITCH TO HOT WATER POSITION
REMOVE CONNECTOR PLUG FROM X2 ON PCB

Next: p216, !f41

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: !p54, !f53

AIR PRESSURE SWITCH AIR DETECT

{ISOLATEMAINSPOWER}<

Next: p66, f65

OVERHEAT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p103, !f102

THERMOCOUPLE OUTPUT MILLIVOLTAGE

Next: p109, !f108

ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: p113, !f112

SPARK GENERATOR INPUT VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p250, f73

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: p70, !f69

FLUE

Next: !p72, !f71

DHW LIMIT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE BROWN AND BLUE WIRES FROM THE DHW LIMIT THERMOSTAT

Next: p82, !f81

GAS VALVE CONTROL KNOB PLASTIC TAB

{ISOLATEMAINSPOWER}

Next: p84, !f83

IGNITION MICROSWITCH RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p86, !f85

FAN VOLTAGE HIGH

SELECTOR SWITCH TO HOT WATER POSITION

Next: !p92, f219

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: !p94, !f93

System Information

  • Total Tests: 201
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control