Fault Finding Charts 3.3 & 3.5 - Rheem II Series Service Instructions Manual

Fault Finding Charts 3.3 & 3.5
3.3
Flame failure
Is error
code 12 YES
displayed?
NO
Abnormal combustion
Is error
code 10 or 99
displayed?
NO
Very high temperature
Is error
code 15 YES
displayed?
NO
Thermistor
connection failure
Is error
code 35
displayed?
NO
Purge failure
Is error
code 81 YES
displayed?
NO
3.6
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"
Are the
max and min
burner pressures
correct?
YES
Test 6 & 7
*Is the resistance
of the thermistors
correct?
*Combustion chamber
and hot water outlet
YES
Are the maximum
and minimum
burner pressures
correct?
YES
Is the PGFR valve
operating
normally?
YES
3.5
Does the
flame extinguish
completely?
YES
Is the
flame detection
maintenance
information
indicating 00?
YES
Adjust maximum and minimum
NO
YES
Clean the heat exchanger,
combustion chamber, fan and air
intake. For error code 99 reset the
PCB by following the procedure in
the section on 'Error Codes'.
NO Replace the relevant thermistor.
thermistors
Adjust maximum and minimum
NO
Test 10
NO Test and replace if faulty
Thermistor connections crossed.
Reposition thermistor connections
For error code 80 or 81 replace
the lower burner assembly.
NO For error code 51 replace the
proportional gas flow regulating
NO Replace the PCB assembly.
Replace flame sensors
burner pressures.
3.2
burner pressures.
correctly.
valve.
44