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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
Faults
I
D
K
NO
NO
NO
Compressor temperature <
evaporator tempe 12°C?
Refrigeration System Fault
Compressor
temperature > 110°C?
Compressor Over-Temperature Fault
HX water outlet
temperature > 73°C?
Water Flow Fault
Tank sensor fault?
Evaporator sensor fault?
Compressor sensor fault?
NO
YES
NO
NO
Fault 9
Red LED
– 9 flashes
YES
Fault 8
Red LED
– 8 flashes
Fault 1
Red LED
– 1 flash
Fault 4
Red LED
– 4 flashes
Fault 5
Red LED
– 5 flashes
Fault 6
Red LED
– 6 flashes
Fault 7
Red LED
– 7 flashes
Fault 3
Red LED
– 3 flashes
YES
YES
YES
YES
NOTE
If Fault 9 has occurred, the
refrigerant high pressure
switch may also have tripped.
J
HX water outlet sensor fault
Compressor temperature > 60°C
for more than 90 minutes
Compressor Cooling Fault
M
H
YES
Is the fault
Fault 9?
NO
L
B
Reset button pressed
at any stage
First or second
consecutive
occurrence
of Fault 9?
YES
Store Fault Code in
controller memory
F
C
NO
FIRMWARE: V5.8
Store Fault Code in
controller memory
