Carrier 30RQ Operation And Maintenance Instructions page 35

Alarm code descriptions (continued)
Alarm code Alarm description
Process faults
P-01 Water heat exchanger frost protection
P-05 Low suction temperature, circuit A
P-06 Low suction temperature, circuit B
P-07 Low suction temperature, circuit C
P-08 High superheat, circuit A
P-09 High superheat, circuit B
P-10 High superheat, circuit C
P-11 Low superheat, circuit A
P-12 Low superheat, circuit B
P-13 Low superheat, circuit C
P-14 Water flow control and customer interlock fault
P-15 Condenser water flow controller fault
P-16 Compressor A1 not started or no pressure increase Manual
P-17 Compressor A2 not started or no pressure increase Manual
P-18 Compressor A3 not started or no pressure increase Manual
P-19 Compressor A4 not started or no pressure increase Manual
P-20 Compressor B1 not started or no pressure increase Manual
P-21 Compressor B2 not started or no pressure increase Manual
P-22 Compressor B3 not started or no pressure increase Manual
P-23 Compressor B4 not started or no pressure increase Manual
P-24 Compressor C1 not started or no pressure increase Manual
P-25 Compressor C2 not started or no pressure increase Manual
P-26 Compressor C3 not started or no pressure increase Manual
P-27 Compressor C4 not started or no pressure increase Manual
P-28 Control box thermostat or phase reversal detected
P-29 Communication loss with the System Manager
P-30 Communicaiton loss between master and slave
MC-nn Master chiller No. 1 configuration error at nn
FC-n0 No factory configuration
FC-01 Illegal factory configuration number
P-31 CCN emergency stop
P-32 Fault water pump 1
P-33 Fault water pump 2
P-34 Reclaim operation failure, circuit A
P-35 Reclaim operation failure, circuit B
P-37 Repeated high pressure unloading, circuit A
P-38 Repeated high pressure unloading, circuit B
P-39 Repeated high pressure unloading, circuit C
P-40 Repeated low suction temperature unloading in
heating mode, circuit A
P-41 Repeated low suction temperature unloading in
heating mode, circuit B
P-42 Repeated low suction temperature unloading,
circuit C
P-43 Heat exchanger temperature too low, less than
10°C, prevents unit start-up
Reset type
Automatic if the same alarm has
not tripped during the last 24
hours, otherwise manual
Automatic when the temperature
returns to normal, and if this alarm
has not appeared during the last
24 hours, otherwise manual
As above
As above
As above
As above
As above
As above
As above
As above
Automatic if the unit is in manual
shut-down status, otherwise
manual
Manual
Automatic when the contact closes
again
Automatic when communication is
re-established
Automatic when communication is
re-established
Automatic when the master
configuration returns to normal or
when the unit is no longer in
master/slave mode
Automatic when the configuration
is entered
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Manual
Manual
Manual
Automatic when the temperature
detected returns to normal or
when the mode returns to cooling
Probable cause Action taken by the control
Water flow rate to low or Unit is shut down
defective thermistor
Pressure sensor defective, Circuit is shut down
EXV blocked or low
refrigerant charge
As above As above
As above As above
As above As above
If free-cooling option is
used: 3-way valve position
incorrect
As above As above
As above As above
As above As above
If free-cooling option is
used: 3-way valve position
incorrect
As above As above
As above As above
Evaporator pump defect or Unit is shut down
water flow switch fault
Sensor defective The heat reclaim mode is stopped
Connection problem Compressor is shut down
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Connection problem As above
Control box badly Unit is shut down
ventilated or poor
electrical connection
CCN installation bus Unit goes into autonomous mode
defective
CCN installation bus As above
defective
Master/slave configuration Master/slave mode is stopped
error
The unit size has not been Unit is shut down
configured
The unit size has been As above
configured with the wrong
value
Network command As above
Pump overheating or poor Unit is completely stopped if there is
pump connection no emergency pump
Pump overheating or poor As above
pump connection
Sensor defective or low The heat reclaim mode of the circuit
condenser water flow rate is stopped
Sensor defective or low As above
condenser water flow rate
Transducer defective or None
ventilation circuit fault
As above As above
As above As above
Pressure sensor defective Circuit is shut down
or refrigerant charge too
low
As above As above
As above As above
Operating compressor The unit cannot start
protection out of range or
pressure sensor fault
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