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”
43
Fault Finding Charts 3.3 and 3.5
Is error
code 12
displayed?
YES
NO
Flame failure
Is error
code 35
displayed?
Is error
code 81
displayed?
NO
NO
Purge failure
3.3
Adjust maximum and minimum
burner pressures.
YES
Does the
flame extinguish
completely?
YES
3.5
For error code 80 or 81 replace
the burner assembly.
For error code 51 replace the
proportional gas flow regulating
valve.
NO
Is the
flame detection
maintenance information
indicating 00?
Replace the PCB assembly.
NO
YES
Test 11
Replace the combustion chamber
front panel or remove the upper
burner assembly and replace
flame sensors depending on the
model
YES
3.6
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
YES
Are the
max and min
burner pressures
correct?
3.2
Is error
code 10 or 99
displayed?
Abnormal
combustion
YES
Is error
code 15
displayed?
NO
NO
*Is the
resistance of the
thermistors
correct?
Replace the relevant thermistor.
Adjust maximum and minimum
burner pressures.
YES
NO
YES
*Combustion chamber
and hot water outlet
thermistors
Thermistor connections crossed.
Reposition thermistor connections
correctly.
Test 22
Very high
temperature
Thermistor
connection
failure