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SM FP_Australia 2017/04 EN
A9
The hot or cold water temperature sensor is not sensing the expected temperature
Component Characteristic: NTC temperature sensor
Warning Message
Appliance keeps operation and code is displayed and
keeps flashing until tap is closed for self reset
Safe Mode Procedure
Start condition:
1. After 30 sec from start up a
misreading temperature is
detected
2. After 2 min of output < 30%
A9 is displayed (no message
if output ok before 2 min)
The Inlet / Outlet NTC
sensor is not
measuring the
expected temperature
Unplug the NTC connection wire
in both inlet / outlet sensors
Measure the NTC electrical
resistance [R] (Ω) in both
sensors
[
R] Ω = Current Temp.
(ºC) ?
Replace Sensor
Refer to table with
values in Service
Manual
Yes
No
Check assembly location on hot water pipe (NTC with red wires) /
cold water pipe (NTC with blue wires) and assure sensor tip is in
contact with pipes (straight surface / not in elbows)
Test appliance and water
stability. Problem solved?
End
Yes
Confirm gas type - Inlet Gas
pressure too low ?
No
Measure dynamic gas
pressure and check
pressure regulator in bottle
Gas type is LPG
(butane) and bottle is
freezing / lower output?
Problem solved?
Yes
No
Recommend different gas
bottle location / regulator
according output power of
appliance
Gas manifold is correct?
(check GN / GPL mark in
injectors distribution
pipe)
Check also the ΔP1 /
ΔP2 values
No
