P-91 Position of the free cooling 3-way valve
incorrect for circuit A
Manual The valve has not reached
the expected position in the
time assigned
Unit is shut down
P-92 Position of the free cooling 3-way valve
incorrect for circuit B
As above As above As above
P-93 Position of the free cooling 3-way valve
incorrect for circuit C
As above As above As above
P-94 Operating fault in free cooling, circuit A Automatic, if the unit switches
back to normal cooling mode
The refrigerant pump has
not correctly started or has
cavitated
The free cooling mode of the circuit is
stopped
P-95 Operating fault in free cooling, circuit B As above As above As above
P-96 Operating fault in free cooling, circuit C As above As above As above
P-97 Reversed entering/leaving water sensors Manual Sensor defective, sensors
reversed
Unit is stopped
CT-01 Fault, contactor stuck, circuit A Manual A compressor contactor is
stuck, the compressor
cannot shut down
Ventilation and EXV control are maintained.
A second critical fault can result in the shut
down of the ventilation, closure of the EXV
and destruction of the compressor
CT-02 Fault, contactor stuck, circuit B As above As above As above
CT-03 Fault, contactor stuck, circuit C As above As above As above
V0-xx Fault, variable speed controller, circuit A Manual or automatic Speed controller fault or
alert
The circuit continues to operate, the speed
controller slows down the motor. The circuit
shuts down
V1-xx Fault, variable speed controller, circuit B As above As above As above
V2-xx Fault, variable speed controller, circuit C As above As above As above
A1-01 Maintenance alert, service number nn Manual The preventive maintenance
date has passed
A1-01 Fault, compressor A1 N°1 See compressor alarm subcode
A1-nn Fault, compressor A1 N°nn See compressor alarm subcode
A2-01 Fault, compressor A2 N°1 See compressor alarm subcode
A2-nn Fault, compressor A2 N°nn See compressor alarm subcode
A3-01 Fault, compressor A3 N°1 See compressor alarm subcode
A3-nn Fault, compressor A3 N°nn See compressor alarm subcode
A4-01 Fault, compressor A4 N°1 See compressor alarm subcode
A4-nn Fault, compressor A4 N°nn See compressor alarm subcode
B1-01 Fault, compressor B1 N°1 See compressor alarm subcode
B1-nn Fault, compressor B1 N°nn See compressor alarm subcode
B2-01 Fault, compressor B2 N°1 See compressor alarm subcode
B2-nn Fault, compressor B2 N°nn See compressor alarm subcode
B3-01 Fault, compressor B3 N°1 See compressor alarm subcode
B3-nn Fault, compressor B3 N°nn See compressor alarm subcode
B4-01 Fault, compressor B4 N°1 See compressor alarm subcode
B4-nn Fault, compressor B4 N°nn See compressor alarm subcode
C1-01 Fault, compressor C1 N°1 See compressor alarm subcode
C1-nn Fault, compressor C1 N°nn See compressor alarm subcode
C2-01 Fault, compressor C2 N°1 See compressor alarm subcode
C2-nn Fault, compressor C2 N°nn See compressor alarm subcode
C3-01 Fault, compressor C3 N°1 See compressor alarm subcode
C3-nn Fault, compressor C3 N°nn See compressor alarm subcode
C4-01 Fault, compressor C4 N°1 See compressor alarm subcode
C4-nn Fault, compressor C4 N°nn See compressor alarm subcode
XX-01* Compressor B1 motor temperature too high Manual Motor fault, wiring The compressor is shut down
XX-02* Compressor B1 crankcase heater fault Manual Crankcase heater defective,
wiring fault
As above
XX-03* Compressor B1 high pressure switch fault Manual Condenser ow rate too low,
condenser valve blocked, fan
circuit fault, condenser air or
water entering temperature
too high
As above
XX-04* PTC temperature probe
Compressor motor B1 out of range
Manual Probe defective As above
XX-05 Compressor board power supply is
disconnected
Automatic Unstable system voltage,
system power supply
unavailable
Compressor is shut down
XX-06 Compressor board and contactor power
supply drop
Automatic Unstable system voltage,
system power supply
unavailable
Compressor is shut down to avoid damage
to the contactors
* 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. Manufactured by: Carrier SCS, Montluel, France.
Manufacturer reserves the right to change any product specication without notice. Printed in the European Union.
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