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”
40
Error Code 29
Error Code 29
Measure the hot water outlet
temperature
Does the measured hot water
temperature match that
indicated by 5y?
Is the resistance of the hot
outlet thermistor normal?
TEST 14
NO
Check the burner pressure and
adjust if necessary.
Refer to section on burner
pressure adjustment
Replace hot outlet thermistorNO
Replace PCBYES
YES
Display maintenance information
„5y‟ on remote control
Is the resistance of the heat
exchanger thermistor normal?
TEST 14
Replace heat exchanger
thermistor
YES
NO
Check heat exchanger for
blockage/restriction (possible
scale build-up). Ensure air inlet is
clear and free of debris
Error Code 31, 32, 33 & 34
Error Code 31, 32, 33, 34
Is the resistance of the
relevant* thermistor normal?
TEST 14
Replace the relevant
thermistor
NO
Is the relevant thermistor
connection to the PCB intact?
YES
Repair connection or replace
thermistor if wiring damaged
NO
Replace PCBYES
* Thermistor error codes:
31 = Water inlet thermistor
32= Heat exchanger thermistor
33 – Hot water outlet thermistor
34 = Ambient air thermistor