Rheem 871026 - Error Codes and Fault Conditions

TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B
D.O.I: February 2008
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
28
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 & 3 - diagnostic points 13, 14 & 15
Flame sensors 1, 2 & 3 - diagnostic points 16 &17
12
Flame failure during operation
P.G.F.R Valve - diagnostic point 10
G.I.S Valve - diagnostic point 11
Solenoid valves 1, 2 & 3 - diagnostic points 13, 14 & 15
Flame sensors 1, 2 & 3 - diagnostic points 16 & 17
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 & 3 - diagnostic points 16 & 17
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 & 3 - 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 & 3 - diagnostic points 13, 14 & 15
Flame sensor 1, 2 & 3 - diagnostic points 16 & 17
81
Post purge malfunction (Solenoid
valve 1 failure)
Solenoid valve 1, 2 & 3 - diagnostic points 13, 14 & 15
Flame sensor 1, 2 & 3 - 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 24 for interpretation of abbreviations.