Specifications

TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
45
Error Code 71
Error Code 71
Is the resistance of the
GISV correct?
TEST 11
Replace proportional gas valveNO
Check gas inlet solenoid valve for
mechanical failure.
Replace PGFR valve if necessary.
Is there voltage at gas inlet
solenoid valve?
TEST 9
Check wiring, if intact replace the
PCB
NO
YES
YES
Error Code 76
Check cables to all temperature controllers. Replace any cables that are open circuit. If no
open circuit cables are found, replace the controller.
Error Code 79
Error Code 79
Is error code 79
redisplayed?
YES
Isolate power, remove the F
connector from
the PCB and restore power
Replace the PCB
Isolate power, refit the F
connector to
the PCB and restore power
NO
Is error code 79
redisplayed?
Error code due to supply
voltage drop
Replace the fan assemblyYES
NO