Specifications

TM002 Integrity 18 & 20L Service Instructions REV: E
D.O.I: 7/11/2007
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
24
Error Codes
The following table outlines the error codes, possible causes and diagnostic tests to
conduct. More detailed diagnosis is outlined in the fault finding and operational flow charts.
Error
Code
Fault Condition Items To Check
10 Abnormal low rate combustion Blockage in the heat exchanger, fan, air intake or flue
11
Ignition failure at start up
Cross light failure
P.G.F.R Valve - diagnostic point 10
G.I.S Valve - diagnostic point 11
Igniter - diagnostic point 12
Solenoid valves 1 & 2 - diagnostic points 13 & 14
Flame sensors 1 & 2 - diagnostic point 16
12 Flame failure during operation
P.G.F.R Valve - diagnostic point 10
G.I.S Valve - diagnostic point 11
Solenoid valves 1 & 2 - diagnostic points 13 & 14
Flame sensors 1 & 2 - diagnostic point 16
14 Over heating Over Heat Limiter - diagnostic point 2
15 Very high temperature
Heat exchanger thermistor - diagnostic point 6
Hot water outlet thermistor - diagnostic point 7
P.G.F.R Valve - diagnostic point 10
16 Outlet water temp too high P.G.F.R Valve - diagnostic point 10
24 Operational switch faulty MAX or MIN button on IC board
31 Inlet thermistor open circuit Water inlet thermistor - diagnostic point 5
32
Heat exchanger thermistor open
circuit
Heat exchanger thermistor - diagnostic point 6
33 Outlet thermistor open circuit Hot water thermistor - diagnostic point 7
34 Ambient air thermistor open circuit Ambient air thermistor - diagnostic point 8
35 Thermistor connections crossed Connection points of thermistors
51 Gas cut off malfunction
G.I.S Valve - diagnostic point 11
Flame sensor 1 & 2 - diagnostic point 16
52 P.G.F.R control failure
P.G.F.R Valve – diagnostic point 10
Gas type circuit board
IC Board
56 Bypass solenoid failure Water Bypass solenoid – diagnostic point 19
61 Abnormal fan speed Fan motor – diagnostic point 4
65
Malfunction of water volume control
motor
Water volume control motor - diagnostic points 18 & 19
71 G.I.S valve control failure
Gas. Inlet Solenoid Valve IC Board (PCB) - diagnostic
point 11
72 Detected false flame Flame sensors 1 & 2 - diagnostic point 9
76
Communication problem between
controller and water heater
Remote controller IC Board or cable
79 Fan motor current detection failure Fan motor IC Board – diagnostic point 4
80 Gas cut off defective
Solenoid valve 1 & 2 - diagnostic points 13 & 14
Flame sensor 1 & 2 - diagnostic point 16
81
Post purge malfunction (Solenoid
valve 1 failure)
Solenoid valve 1 & 2 - diagnostic points 13 & 14
Flame sensor 1 & 2 - diagnostic point 9
82
Functional problem on gas type
circuit board
Gas type circuit board
99 Abnormal combustion
Blockage in the heat exchanger, fan, air intake or flue
way
Note: see page 20 for interpretation of abbreviations.