Carrier 30RQ Operation And Maintenance Instructions page 36

Alarm code descriptions
Alarm code Alarm description
Process faults (cont'd)
P-91 Position of the free cooling 3-way valve
incorrect for circuit A
P-92 Position of the free cooling 3-way valve
incorrect for circuit B
P-93 Position of the free cooling 3-way valve
incorrect for circuit C
P-94 Operating fault in free cooling, circuit A
P-95 Operating fault in free cooling, circuit B
P-96 Operating fault in free cooling, circuit C
P-97 Reversed entering/leaving water sensors
CT-01 Fault, contactor stuck, circuit A
CT-02 Fault, contactor stuck, circuit B
CT-03 Fault, contactor stuck, circuit C
V0-xx Fault, variable speed controller, circuit A
V1-xx Fault, variable speed controller, circuit B
V2-xx Fault, variable speed controller, circuit C
Maintenance alarms
A1-01 Maintenance alert, service number nn
Compressor faults
A1-01 Fault, compressor A1 N°1
A1-nn Fault, compressor A1 N°nn
A2-01 Fault, compressor A2 N°1
A2-nn Fault, compressor A2 N°nn
A3-01 Fault, compressor A3 N°1
A3-nn Fault, compressor A3 N°nn
A4-01 Fault, compressor A4 N°1
A4-nn Fault, compressor A4 N°nn
B1-01 Fault, compressor B1 N°1
B1-nn Fault, compressor B1 N°nn
B2-01 Fault, compressor B2 N°1
B2-nn Fault, compressor B2 N°nn
B3-01 Fault, compressor B3 N°1
B3-nn Fault, compressor B3 N°nn
B4-01 Fault, compressor B4 N°1
B4-nn Fault, compressor B4 N°nn
C1-01 Fault, compressor C1 N°1
C1-nn Fault, compressor C1 N°nn
C2-01 Fault, compressor C2 N°1
C2-nn Fault, compressor C2 N°nn
C3-01 Fault, compressor C3 N°1
C3-nn Fault, compressor C3 N°nn
C4-01 Fault, compressor C4 N°1
C4-nn Fault, compressor C4 N°nn
Process faults
XX-01* Compressor B1 motor temperature too high Manual
XX-02* Compressor B1 crankcase heater fault
XX-03* Compressor B1 high pressure switch fault
XX-04* PTC temperature probe
Compressor motor B1 out of range
XX-05 Compressor board power supply is
disconnected
XX-06 Compressor board and contactor power
supply drop
* XX-04 = A1 to A4, B1 to B4 and C1 to C4
Order No. 13440-76, 03.2013. Supersedes order No.: 13440-76,10.2011.
Manufacturer reserves the right to change any product specification without notice.
Reset type
Manual
As above
As above
Automatic, if the unit switches
back to normal cooling mode
As above
As above
Manual
Manual
As above
As above
Manual or automatic
As above
As above
Manual
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
See compressor alarm subcode
Manual
Manual
Manual
Automatic
Automatic
Probable cause Action taken by the control
The valve has not reached Unit is shut down
the expected position in the
time assigned
As above As above
As above As above
The refrigerant pump has The free cooling mode of the circuit is
not correctly started or has stopped
cavitated
As above As above
As above As above
Sensor defective, sensors Unit is stopped
reversed
A compressor contactor is Ventilation and EXV control are maintained.
stuck, the compressor A second critical fault can result in the shut
cannot shut down down of the ventilation, closure of the EXV
and destruction of the compressor
As above As above
As above As above
Speed controller fault or The circuit continues to operate, the speed
alert controller slows down the motor. The circuit
shuts down
As above As above
As above As above
The preventive maintenance
date has passed
Motor fault, wiring The compressor is shut down
Crankcase heater defective, As above
wiring fault
Condenser flow rate too low, As above
condenser valve blocked, fan
circuit fault, condenser air or
water entering temperature
too high
Probe defective As above
Unstable system voltage, Compressor is shut down
system power supply
unavailable
Unstable system voltage, Compressor is shut down to avoid damage
system power supply to the contactors
unavailable
Manufactured by: Carrier SCS, Montluel, France.
Printed in the European Union.