34
This document is stored and maintained electronically by
Service. All printed copies are deemed uncontrolled.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
Fault Finding: Chart 4
Element Mode and/or
Insufficient Hot Water
4
Is the red LED displaying
a Fault Code?
Isolate and restore power to the
heater. Is the red LED now
displaying a Fault Code?
Is the green LED displaying
1 long flash?
NO
NO
11
YES
YES
YES
Has the heat pump module mains
cable been unplugged and an
Element Plug left plugged into the
cable?
Isolate power, remove the Element
Plug and recommence full diagnosis
from the
General Fault Diagnosis Chart.
YES
5
NO
NO
Element Mode
– Ambient is utilised if
the ambient temperature is outside the
heat pump‟s operating limits.
Normal Operation
Reset the heat pump using the
reset button, and use the proxy
sensor or draw off water to initiate
a call for heating.
Does the evaporator fan come on
at the same time as the
compressor, and run in the
correct direction at full speed?
12
NO
The evaporator
fan exhausts air
out the front of
the heat pump.
Is the airflow obstructed?
YES
Remove the obstruction.
YES
1.Clean the evaporator coil.
2. Ensure the air path around the heat
pump is clear and the heat pump is
not installed in an enclosed room.
NO
Is the evaporator sensor working?
TEST 1
Replace the evaporator sensor.
Is the ambient air temperature
less than 4°C or
greater than 45°C?
YES
NO
NO
YES
Reference 12
can be found
on Chart 11.1
