XSol Diagnostic System

IDEAL STELRAD SPRINT 90 NF

G.C. NUMBER 47 415 0

Next: &17, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CH BURNER MODULATION

PRE-HEAT SWITCH OFF<

Next: &nff, f32

CENTRAL HEATING OPERATION

PRE-HEAT SWITCH OFF<

Next: &180, ?172, ?174, ?176, ?178

PRE-HEAT CYCLE COMPLETED

CH SWITCH OFF
ENS

Next: &3, f163

DHW BURNER MODULATION

PRE-HEAT SWITCH OFF<

Next: &4, f156

DHW OPERATION

PRE-HEAT SWITCH OFF
DHW TEMPERATURE SET TO MAXIMUM POSITION

Next: &5, ?144, ?146, ?148

CH BURNER IGNITES (FAN SPEED HIGH THEN LOW)

PRE-HEAT SWITCH OFF
CH SWITCH ON

Next: &6, ?126, ?128, ?130

DIVERTER VALVE ENERGISED (CH DEMAND)

REMOVE METAL TOP COVER FROM DIVERTER VALVE
PRE-HEAT SWITCH OFF

Next: &7, f111

DHW MAXIMUM PRESSURE

PRE-HEAT SWITCH OFF
ATTACH U-GAUGE TO BURNER PRESSURE TEST POINT

Next: &8, f92

BURNER IGNITES (PRE-HEAT)

CH SWITCH OFF
ENS

Next: &9, ?97, ?99

PILOT IGNITES (PRE-HEAT)

CH SWITCH OFF
ENS

Next: &10, ?25, ?27

FAN RUNS (PRE-HEAT)

CH SWITCH OFF
ENS

Next: &11, f53

PUMP RUNS (PRE-HEAT)

CH SWITCH OFF
ENS

Next: &12, f38

DHW FLOW SWITCH (OPERATION)

ELECTRICALLY DISCONN

Next: &13, !f37

DHW FLOW RATE

Next: &14, f19

SYSTEM CHECKS

PLEASE ENSURE ALL THE FOLLOWING SYSTEM CHECKS ARE COMPLETED

Next: &15, !f186

ELECTRICAL SAFETY CHECKS

BOILER DISCONNECTED FROM MAINS SUPPLY.

Next: &16, !f18

SYSTEM PRESSURE RISE

PRE-HEAT SWITCH OFF
CH TEMPERATURE SET TO MAXIMUM POSITION

Next: &1, !f181

BURNER IGNITES

PCB 23

Next: End

BURNER IGNITES

ELECTRODE AND LEAD (SENSE)

Next: End

MAIN SOLENOID RESISTANCE

GAS VALVE

Next: End

BURNER PRESSURE

GAS VALVE

Next: End

DIVERTER VALVE ENERGISED

CH SWITCH

Next: End

EXTERNAL CONTROLS 1 VOLTAGE (INPUT)

Next: End

DIVERTER VALVE ENERGISED

Next: End

DIVERTER VALVE ENERGISED

DIVERTER VALVE HEAD

Next: End

CH BURNER IGNITES

CH SENSOR

Next: End

FAN RUNS HIGH SPEED, THEN LOW SPEED BURNER CYCLES

PCB 23

Next: End

CH BURNER IGNITES

FAN

Next: End

CH BURNER IGNITES

AIR PRESSURE SWITCH TUBES

Next: End

CH BURNER IGNITES

HOOD ASSEMBLY (AIR PRESSURE SENSING TUBE)

Next: End

CH BURNER IGNITES

FAN (VENTURI)

Next: End

DHW OPERATION

PRIMARY HEAT EXCHANGER

Next: End

DHW OPERATION

PCB 23

Next: End

DHW OPERATION

DIVERTER VALVE HEAD

Next: End

DHW BURNER MODULATION

DHW SENSOR

Next: End

POTENTIOMETER ASSEMBLY (DHW)

Next: End

PRE-HEAT CYCLE COMPLETED

DIVERTER VALVE HEAD

Next: End

PRE-HEAT CYCLE COMPLETED

PCB 23

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL CHECKS

Next: End

SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

CH OPERATION

CH SENSOR

Next: End

DHW OK, CH QUIET, RADIATORS COOL, BURNER PRESSURE OK

DIVERTER VALVE

Next: End

SYSTEM CHECKS

Next: End

SPARK PRESENT AT ELECTRODE BUT NO IGNITION GV1

GAS VALVE

Next: End

DHW FLOW RATE

DHW FLOW ADJUSTER

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

CH BURNER MODULATION

POTENTIOMETER ASSEMBLY (CH)

Next: End

CH BURNER MODULATION

CH SENSOR

Next: End

DHW FLOW SWITCH

Next: End

PUMP RUNS

FUSE

Next: End

PUMP RUNS

Next: End

PUMP RUNS

PRE-HEAT THERMOSTAT

Next: End

PUMP RUNS

DRY FIRE THERMOSTAT

Next: End

PUMP VOLTAGE

PCB 23

Next: End

FAN RUNS

AIR PRESSURE SWITCH TUBES

Next: End

FAN RUNS

FAN (VENTURI)

Next: End

FAN RUNS

DHW SENSOR

Next: End

FAN RUNS

PCB 23

Next: End

FAN RUNS

CH OVERHEAT THERMOSTAT

Next: End

FAN VOLTAGE

PCB 22

Next: End

AIR PRESSURE SWITCH VOLTAGE

PCB 22

Next: End

PILOT IGNITES

AIR PRESSURE SWITCH TUBES

Next: End

PILOT IGNITES

FLUE

Next: End

PILOT IGNITES

FAN (VENTURI)

Next: End

SPARK GENERATOR OUTPUT

PCB 22

Next: End

SPARK PRESENT AT ELECTRODE BUT NO IGNITION

PCB 22

Next: End

PILOT IGNITES

PILOT INJECTOR

Next: End

SPARK PRESENT AT ELECTRODE BUT NO IGNITION

ELECTRODE AND LEAD (SPARK)

Next: End

DHW MAXIMUM PRESSURE

DHW SENSOR

Next: End

MAIN BURNER IGNITES, BURNER PRESSURE TOO HIGH

GAS VALVE

Next: End

BURNER IGNITES

PCB 22

Next: End

BURNER IGNITES

BURNER INJECTOR

Next: End

EXTERNAL CONTROLS 1 VOLTAGE (OUTPUT)

Next: End

DIVERTER VALVE ENERGISED

Next: End

EXTERNAL CONTROLS 2 RESISTANCE

Next: End

DIVERTER VALVE ENERGISED

DIVERTER VALVE MOTOR

Next: End

FAN RUNS HIGH SPEED ONLY

PCB 23

Next: End

CH SENSOR RESISTANCE

PCB 23

Next: End

CH BURNER IGNITES

AIR PRESSURE SWITCH

Next: End

DHW QUIET OPERATION, RADIATORS REMAIN COLD

SECONDARY HEAT EXCHANGER

Next: End

DHW PRIMARY HEAT EXCHANGER NOISY (KETTLING)

SECONDARY HEAT EXCHANGER

Next: End

DHW BURNER MODULATION

GAS VALVE

Next: End

DHW BURNER MODULATION

PCB 23

Next: End

PRE-HEAT CYCLE COMPLETED

PRE-HEAT THERMOSTAT

Next: End

PRE-HEAT CYCLE COMPLETED

DIVERTER VALVE

Next: End

CH PRIMARY HEAT EXCHANGER NOISY DHW OK

Next: End

DHW OK, CH FLOW PIPE DOES NOT HEAT UP

DIVERTER VALVE

Next: End

CH OPERATION

PCB 23

Next: End

DHW OK, CH QUIET, RADIATORS COOL, BURNER PRESSURE OK

Next: End

DHW OPERATION

DIVERTER VALVE

Next: End

PCB 23 (LOW CH BURNER PRESSURE)

PCB 23

Next: End

DHW FLOW RATE

SECONDARY HEAT EXCHANGER (SCALED)

Next: End

CH BURNER MODULATION

PCB 23

Next: End

MAINS POWER SUPPLY

Next: End

PUMP RUNS

PRE-HEAT SWITCH

Next: End

PUMP RUNS

PUMP

Next: End

FAN RUNS

AIR PRESSURE SWITCH

Next: End

PCB 23 RELAY 'C' OPERATION

PCB 22

Next: End

FAN RUNS

DHW OVERHEAT THERMOSTAT

Next: End

FAN RUNS

FAN

Next: End

PILOT IGNITES

AIR PRESSURE SWITCH

Next: End

NO SPARK PRESENT AT ELECTRODE

ELECTRODE AND LEAD (SPARK)

Next: End

SPARK PRESENT AT ELECTRODE BUT NO IGNITION GV2

GAS VALVE

Next: End

DHW MAXIMUM PRESSURE

GAS VALVE

Next: End

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM CH BURNER IGNITES (FAN SPEED HIGH THEN LOW)

Next: p127

FAN RUNS HIGH SPEED ONLY

CHARACTERISTIC TEST FROM CH BURNER IGNITES (FAN SPEED HIGH THEN LOW)

Next: !p129

FAN RUNS HIGH SPEED, THEN LOW SPEED, BURNER CYCLES ON AND OFF

CHARACTERISTIC TEST FROM CH BURNER IGNITES (FAN SPEED HIGH THEN LOW)

Next: p131

DHW OPERATION PRIMARY HEAT EXCHANGER NOISY (KETTLING)

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p145

DHW QUIET OPERATION, RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p147

DHW QUIET OPERATION, RADIATORS WARM

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p149

CH PRIMARY HEAT EXCHANGER NOISY, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION (ACC)

Next: !p173

DHW OK, CH FLOW PIPE DOES NOT HEAT UP

CHARACTERISTIC TEST FROM CH OPERATION (ACC)

Next: !p175

DHW OK, CH QUIET, RADIATORS COOL, BURNER PRESSURE INCORRECT

CHARACTERISTIC TEST FROM CH OPERATION (ACC)

Next: p177

DHW OK, CH QUIET, RADIATORS COOL, BURNER PRESSURE CORRECT

CHARACTERISTIC TEST FROM CH OPERATION (ACC)

Next: p179

NO SPARK PRESENT AT THE ELECTRODE

CHARACTERISTIC TEST FROM PILOT IGNITES (PRE-HEAT)

Next: p26

SPARK PRESENT AT ELECTRODE, BUT NO IGNITION

CHARACTERISTIC TEST FROM PILOT IGNITES (PRE-HEAT)

Next: p28

MAIN BURNER IGNITES, BURNER PRESSURE TOO HIGH

CHARACTERISTIC TEST FROM BURNER IGNITES (PRE-HEAT)

Next: p98

MAIN BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM BURNER IGNITES (PRE-HEAT)

Next: p100

22/04/2010 10:38:59 1_0_1 23/04/2010 12:51:22

23/04/2010 09:35:52

Next: End

FLAME SENSE ELECTRODE & LEAD (BURNER)

Next: !p106, !f105

PCB 23 RELAY A OPERATION

CH SWITCH ON

Next: p113, f112

EXTERNAL CONTROLS 1 VOLTAGE (OUTPUT)

PRE-HEAT SWITCH OFF
EXTERNAL CONTROLS (I.E. ROOM THERMOSTAT/PROGRAMMER) CALLING
CH SWITCH ON

Next: !p115, f114

CH SWITCH (RESISTANCE)

REMOVE YELLOW WIRES FROM CH SWITCH
CH SWITCH ON

Next: p117, !f116

EXTERNAL CONTROLS 2 RESISTANCE (ROOM THERMOSTAT)

EXTERNAL CONTROLS (I.E. ROOM THERMOSTAT/PROGRAMMER) CALLING
PRE-HEAT SWITCH OFF
CH SWITCH ON

Next: !p123, !f122

DHW MODULATION VOLTAGE

DHW TEMPERATURE SET TO MAXIMUM POSITION
FLOW RATE AT TAP SET TO APPROX 7 LTR/MIN

Next: !p158, f157

DHW SENSOR RESISTANCE (MODULATION)

SET FLOW RATE AT TAP TO APPROXIMATELY 7 LTR/MIN

Next: p160, !f159

DIVERTER VALVE LETTING BY

ROOM THERMOSTAT CALLING (IF FITTED)
CH SWITCH IN OFF POSITION

Next: !p165, f164

DIVERTER VALVE (GEARING FULLY TO DHW POSITION)

Next: p167, !f166

DHW FLOW RATE ADJUSTER

(ENSURE HOT TAP IS FULLY ON)

Next: p21, !f20

CH POTENTIOMETER RESISTANCE

DISCONNECT CONNECTOR MARKED M1/M7 FROM MAIN PCB 23

Next: p34, !f33

PRE-HEAT THERMOSTAT VOLTAGE (OUTPUT)

ENSURE SECONDARY HEA

Next: p40, f39

PRE-HEAT SWITCH VOLTAGE (INPUT)

ENSURE SECONDARY HEA

Next: p42, f41

FUSE RESISTANCE

REMOVE FUSE FROM MAIN PCB 23 (LOCATED BELOW TERMINAL STRIP TOWARDS THE R/H SIDE OF THE PCB)

Next: p44, !f43

AIR PRESSURE SWITCH (NC RESISTANCE)

DISCONNECT RED LEAD FROM THE AIR PRESSURE SWITCH

Next: p55, f54

AIR PRESSURE SWITCH TUBES (FAN)

Next: p57, !f56

DHW SENSOR RESISTANCE (DEMAND)

ENSURE DHW IS COOL (

Next: p63, !f62

CH OVERHEAT THERMOSTAT (RESISTANCE)

REMOVE VIOLET SPADED WIRES FROM CH OVERHEAT THERMOSTAT

Next: !p69, !f68

AIR PRESSURE SWITCH VOLTAGE (COM)

ENSURE SECONDARY HEA

Next: p75, !f74

DHW MODUREG FULL VOLTAGE

ENSURE DHW IS COOL (

Next: !p94, f93

DHW SENSOR RESISTANCE (FULL DEMAND)

ENSURE DHW IS COOL (

Next: !p189, !f95

MAIN SOLENOID VOLTAGE (GV2)

CH SWITCH OFF
ENS

Next: p104, f103

MAIN SOLENOID RESISTANCE (GV2)

REMOVE GREY PLASTIC

Next: p108, !f107

BURNER PRESSURE (IGNITION)

CH SWITCH OFF
ENS

Next: !p110, !f109

DIVERTER VALVE VOLTAGE (INPUT)

PRE-HEAT SWITCH OFF
CH SWITCH ON

Next: p121, f120

EXTERNAL CONTROLS 1 VOLTAGE (INPUT)

PRE-HEAT SWITCH OFF

Next: !p119, !f118

DIVERTER VALVE (GEARING MOVES FREELY)

REMOVE THE METAL TOP COVER OF THE DIVERTER VALVE

Next: !p125, !f124

CH SENSOR RESISTANCE (DEMAND)

ENSURE BOILER IS NOT

Next: !p133, !f132

FAN VOLTAGE (LOW SPEED)

PRE-HEAT SWITCH OFF
CH SWITCH ON

Next: p135, !f134

FAN MOTOR RESISTANCE (LOW SPEED)

DISCONNECT 12 PIN CONNECTOR MARKED D18 TO D29 (TOP L/H SIDE) FROM MAIN PCB 23

Next: p137, !f136

AIR PRESSURE SWITCH TUBES (FAN)

Next: p139, !f138

AIR PRESSURE SENSING TUBE (METAL)

Next: p141, !f140

VENTURI (FAN)

Next: !p143, !f142

CH OPERATION

Next: !p151, !f150

PCB 23 (DIVERTER VALVE VOLTAGE FAULT)

PRE-HEAT SWITCH ON
CH SWITCH OFF

Next: p153, !f152

DIVERTER VALVE (GEARING IN DHW POSITION)

Next: !p188, !f154

DHW POTENTIOMETER RESISTANCE

DISCONNECT CONNECTOR MARKED M1/M7 FROM MAIN PCB 23

Next: !p162, !f161

PCB 23 (DIVERTER VALVE VOLTAGE FAULT)

PRE-HEAT SWITCH ON
CH SWITCH OFF

Next: !p169, !f168

CH SENSOR RESISTANCE (FULL DEMAND)

DISCONNECT PLUG FROM

Next: !p183, !f182

DIVERTER VALVE FULLY OPEN (CH DEMAND)

PRE-HEAT SWITCH OFF
REMOVE METAL TOP COVER FROM THE DIVERTER VALVE

Next: !p185, !f184

DHW INLINE FILTER

COLD WATER OFF

Next: !p23, !f22

AIR PRESSURE SWITCH VOLTAGE (AIR DETECT)

ENSURE SECONDARY HEA

Next: p73, f72

PILOT SOLENOID RESISTANCE (GV1)

REMOVE PLUG FROM PILOT SOLENOID (SECURED BY 1 CENTRAL SCREW)

Next: p85, !f187

CH SENSOR RESISTANCE (MODULATION)

PRE-HEAT SWITCH OFF
CH SWITCH ON
CH TEMPERATURE SELECTOR TO MAXIMUM POSITION

Next: !p36, !f35

DRY FIRE THERMOSTAT (RESISTANCE)

REMOVE SPADED RED WI

Next: p50, !f49

PRE-HEAT THERMOSTAT RESISTANCE

ENSURE SECONDARY HEA

Next: !p48, !f47

MAINS POWER SUPPLY

Next: !p46, !f45

PUMP VOLTAGE

ENSURE SECONDARY HEA

Next: !p52, !f51

AIR PRESSURE SWITCH (VOLTAGE NC)

CH SWITCH OFF
ENS

Next: p61, f60

VENTURI (FAN)

Next: !p59, !f58

CH OVERHEAT THERMOSTAT VOLTAGE (OUTPUT)

CH SWITCH OFF
ENS

Next: p67, f66

PCB 23 RELAY 'C' OPERATION (VOLTAGE)

UNPLUG IGNITION PCB

Next: !p65, !f64

FAN VOLTAGE (HIGH SPEED)

CH SWITCH OFF
ENS

Next: !p71, !f70

SPARK GENERATOR OUTPUT

ENSURE SECONDARY HEA

Next: !p83, !f82

AIR PRESSURE SWITCH TUBES (PILOT)

Next: p77, !f76

FLUE

Next: p79, !f78

VENTURI (PILOT)

Next: !p81, !f80

PILOT SOLENOID VOLTAGE (GV1)

ENSURE SECONDARY HEA

Next: p87, !f86

PILOT INJECTOR

Next: p89, !f88

SPARK ELECTRODE & LEAD (PILOT)

Next: !p91, !f90

MODULATION VOLTAGE (FAULT)

CH SWITCH OFF
ENS

Next: !p102, !f101

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