
AQUACIAT
POWER
EN -
50
9 - DIAGNOSTICS
JBus
code Code Alarm description
Reset type
Action taken
Possible cause
27 4703
LOSS OF COMMUNICATION WITH VFD
FAN DRIVE 1 CIRCUIT B
As above
Unit is restarted with another
pump running. If no pumps are
available, the unit shuts down
As above
28 4704
LOSS OF COMMUNICATION WITH VFD
FAN DRIVE 2 CIRCUIT B
As above
As above
As above
29 4705
LOSS OF COMMUNICATION WITH VFD
PUMP DRIVE NUMBER 1
As above
As above
As above
30 4706
LOSS OF COMMUNICATION WITH VFD
PUMP DRIVE NUMBER 2
As above
As above
As above
Process failure
31 10001 WATER EXCHANGER FREEZE
PROTECTION
Automatic (the first alarm
in the last 24 hours) or
Manual
Unit shuts down, but the pump
continues to run
No water flow,
defective thermistor
32 10005 CIRCUIT A LOW SATURATED SUCTION
TEMPERATURE
As above
Unit shuts down
Pressure transducer
defective, EXV blocked
or lack of refrigerant
33 10006 CIRCUIT B LOW SATURATED SUCTION
TEMPERATURE
As above
Unit shuts down
As above
34 10008 CIRCUIT A HIGH SUPERHEAT
Manual
Circuit A shuts down
Pressure transducer
defective, temperature
sensor defective,
EXV blocked or lack of
refrigerant
35 10009 CIRCUIT B HIGH SUPERHEAT
Manual
Circuit B shuts down
As above
36 10011 CIRCUIT A LOW SUPERHEAT
Manual
Circuit A shuts down
As above
37 10012 CIRCUIT B LOW SUPERHEAT
Manual
Circuit B shuts down
As above
38 10014 CUSTOMER INTERLOCK FAILURE
Automatic (the unit is
OFF) or Manual
Unit shuts down
Customer interlock
input set on
39 10016 COMPRESSOR A1 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor A1 shuts down
Compressor breaker or
fuse fault, compressor
switch open
40 10017 COMPRESSOR A2 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor A2 shuts down
As above
41 10018 COMPRESSOR A3 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor A3 shuts down
As above
42 10019 COMPRESSOR A4 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor A4 shuts down
As above
43 10020 COMPRESSOR B1 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor B1 shuts down
As above
44 10021 COMPRESSOR B2 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor B2 shuts down
As above
45 10022 COMPRESSOR B3 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor B3 shuts down
As above
46 10023 COMPRESSOR B4 NOT STARTED OR
PRESSURE INCREASE NOT
ESTABLISHED
Manual
Compressor B4 shuts down
As above
47 10028 ELECTRICAL BOX FAULT
Automatic
Unit shuts down
Main power supply
fault or high
temperature in the
control box (units with
high ambient
temperature option)
48 10030 MASTER/SLAVE COMMUNICATION
FAILURE
As above
Master/slave operation is
disabled and the unit returns to
the stand-alone mode
As above
49 10031 UNIT IS IN NETWORK EMERGENCY STOP Automatic, if emergency
stop is deactivated
Unit shuts down
Network emergency
stop command
50 10032 WATER PUMP #1 FAULT
Manual
Unit is restarted with another
pump running. If no pumps are
available, the unit shuts down
Evaporator flow switch
or evaporator pump
fault
51 10033 WATER PUMP #2 FAULT
Manual
As above
As above
52 10037 CIRCUIT A - REPEATED HIGH DISCHARGE
GAS OVERRIDES
Automatic (no discharge
gas override within 30
min) or Manual (the
counter forced to 0)
None
Repetitive capacity
decreases
53 10038 CIRCUIT B - REPEATED HIGH
DISCHARGE GAS OVERRIDES
As above
None
As above
54 10040 CIRCUIT A - REPEATED LOW SUCTION
TEMP OVERRIDES
Manual
(the counter forced to 0)
Circuit A shuts down
Repetitive capacity
decreases