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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 11.8
Red LED: 8 flashes
Fault 8
Water Flow Fault
11.8
NO
Is the heat exchanger water outlet
sensor working?
TEST 1
Replace the sensor.
NO
YES
11.10
Fault Finding: Chart 11.9
Red LED: 9 flashes
Fault 9
Refrigeration System Fault
All Heating Disabled
11.9
NO
Is the compressor sensor
working?
TEST 1
Replace the sensor.
NO
NOTES
1. The reset button will reset Fault 9, reset the Fault 9 counter and clear the stored
Fault Code from the controller memory.
2. Fault 9 will not disable all heating unless it has occurred 3 consecutive times.
3. If Fault 9 has occurred, the refrigerant high pressure switch may also have tripped.
Is the evaporator sensor working?
TEST 1
YES
Replace the sensor.
NO
Does the compressor operate
when the green LED
is showing 2 flashes?
9
YES
11.11
NO
Is the evaporator sensor and clip
inserted firmly into the fins of the
evaporator coil?
YES
NO
Secure the evaporator sensor and clip
firmly into the fins of the evaporator
coil.
Reset Fault 9 using the reset button.
YES
Reset the heat pump using the reset
button, and use the proxy sensor or
draw off water to initiate a call for
heating.
