I
D
K
NO
NO
NO
Compressor temperature <
evaporator temperature + 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
FC
NO
FIRMWARE: V5.8
Store Fault Code in
controller memory