Table of Contents
Advertisement
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
10
Abnormal low rate combustion
11
Ignition failure at start up
12
Flame failure during operation
14
Over heating
15
Very high temperature
24
Operational switch faulty
31
Inlet thermistor open circuit
32
Heat exchanger thermistor open circuit
33
Outlet thermistor open circuit
34
Ambient air thermistor open circuit
35
Thermistor connections crossed
51
Gas cut off malfunction (SV0 failure)
52
P.G.F.R control failure
61
Abnormal fan speed or fan failure
65
Malfunction of water volume control motor Water volume control motor - diagnostic point 15
71
G.I.S valve control failure
72
Detected false flame
73
Vent type control data failure
74 75
Communication problem between remote
76
controller and water heater
79
Fan motor current detection failure
Gas cut off defective
80
(Solenoid valve 1-3 failure)
81
No false flame detected
Functional problem on gas type circuit
82
board
90
Decrease in fan motor ventilation.
Decrease
in
99
(Operation stop)
Note: see page 22 for interpretation of abbreviations.
TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled"
Fault Condition
fan
motor
ventilation.
Items To Check
Blockage in the heat exchanger fins, fan, air
intake or flue diagnostic point 4
P.G.F.R Valve - diagnostic point 10
G.I.S Valve - diagnostic point 11
Igniter - diagnostic point 12
Solenoid valve 2- diagnostic points 13,
Flame sensors 1,diagnostic points 14
P.G.F.R Valve - diagnostic point 16
G.I.S Valve - diagnostic point 16
Solenoid valves 1, 2 & 3 - diagnostic point 16
Flame sensors 1 & 2.- diagnostic points 16
Over Heat Limiter - diagnostic point 2
Heat exchanger thermistor - diagnostic point 6
P.G.F.R Valve - diagnostic point 10
MAX, MIN or Adj button on PC board.-. Remote
controller & Bath fill switches
Water inlet thermistor - diagnostic point 5
Heat exchanger thermistor - diagnostic point 6
Hot water thermistor - diagnostic point 7
Ambient air thermistor - diagnostic point 8
Connection points of thermistors
G.I.S Valve - diagnostic point 16
Flame sensor 1 & 2 - diagnostic point 16
P.G.F.R Valve – diagnostic point 16
PC Board (PCB)
Fan motor – diagnostic point 4
PC Board (PCB)
O.H.L. - diagnostic point 2
Heat exchange thermistor diagnostic point 6
Gas. Inlet Solenoid Valve diagnostic 10
Solenoid Valves 1, 2 & 3 diagnostic 16
PC Board (PCB)
Flame sensors 1, & 2 - diagnostic point 9
PC Board (PCB)
Gas type circuit board
Remote controller PC Board or
Remote controller cable
Fan motor – diagnostic point 4
PC Board (PCB)
Solenoid valve 1, 2 & 3 - diagnostic point 16
Flame sensor 1, & 2 - diagnostic point 16
Solenoid valve 1, 2 & 3 - diagnostic point 16
Flame sensor 1, & 2 - diagnostic point 16
PC Board (PCB)
Gas type circuit board
Blockage in the heat exchanger, fins, fan
air intake or flue way
Blockage in the heat exchanger, fins, fan
air intake or flue way
26
Advertisement
Table of Contents
