Alarm Codes - Carrier PRO-DIALOG PLUS 30RW Manual

6.4 - Alarm codes

The following list gives a complete description of each alarm code and its possible cause.
ALARM CODE DESCRIPTIONS
ALARM NAME
ALARM
CODE
1 Compressor A1 failure
2 Compressor A2 failure
5 Compressor B1 failure
6 Compressor B2 failure
9 Evaporator leaving water
thermistor failure
10 Evaporator entering water
thermistor failure
11 CHWS thermistor failure
(master/slave)
12 Condenser leaving water
thermistor failure
13 Condenser entering water
thermistor failure
14 OAT sensor failure
15 Drycooler leaving water
thermistor failure
16 Discharge pressure transducer
failure, Circuit A
17 Discharge pressure transducer
failure, Circuit B
18 Suction pressure transducer
failure, Circuit A
19 Suction pressure transducer
failure, Circuit B
21 CCN/clock board failure
22 Loss of communication with
slave board
23 Loss of communication with
PD_AUX1 board
24 Loss of communication with
variable-speed drive 1
25 Loss of communication with
variable-speed drive 2
30 Low refrigerant pressure failure,
circuit A
31 Low refrigerant pressure failure,
circuit B
32 High pressure failure, circuit A
33 High pressure failure, circuit B
34 High pressure switch not reset
or compressor reverse rotation,
circuit A
35 High pressure switch not reset
or compressor reverse rotation,
circuit B
36 Water heat exchanger frost
protection
37 Repeated low evaporator
suction temperature unloading,
circuit A
38 Repeated low evaporator suction
temperature unloading, circuit B
39 Repeated high pressure
unloading, circuit A
40 Repeated high pressure
unloading, circuit B
41 Repeated high discharge
temperature unloading, circuit A
42 Repeated high discharge
temperature unloading, circuit B
ALARM DESCRIPTION
Motor safety input has opened due to
compressor overtemperature protection.
As above
As above
As above
Thermistor outside range
As above
As above
As above
As above
As above
Thermistor outside range
Voltage delivered by the sensor is incorrect
Value read by the sensor is outside range
Voltage delivered by the sensor is incorrect
Value read by the sensor is outside range
The clock board is no longer detected
Communication has been lost with the slave
board (circuit B control)
Communication has been lost with the
drycooler or remote condenser control
Communication has been lost with the
condenser pump 1 control
Communication has been lost with the
condenser pump 2 control
Circuit running and the suction pressure
below threshold
As above
Circuit running and the discharge pressure
exceeds the high pressure trip point
As above
The high pressure switch has not been reset
following a high pressure trip or one circuit
compressor runs in reverse rotation
As above
The heat exchanger entering or leaving
water sensor is below the frost trip point
More than 6 successive circuit capacity
unloads because of low suction temperature
override.
As above
More than 6 successive circuit capacity
unloads because of high pressure override.
As above
More than 8 successive circuit capacity
unloads because of high discharge
temperature
As above
ACTION TAKEN BY RESET TYPE
THE CONTROL
Compressor is shut Manual
down
As above As above
As above As above
As above As above
Unit shut down Automatic, if temp. measured by sensor
returns to permitted range of values
As above As above
As above As above
Unit shut down for heat As above
pumps, otherwise no
action
As above As above
Unit shut down As above
Unit shut down if it is in As above
cooling mode
Circuit A shut down Automatic if the voltage delivered by the
sensor returns to normal
Circuit B shut down As above
Circuit A shut down As above
Circuit B shut down As above
Unit shut down Automatic if board is detected again
Circuit B shut down Automatic if communication is re-
established
Unit shut down As above
Change-over to second As above
condenser pump, if
available, otherwise unit
shut down
Change-over to first As above
condenser pump, if
available, otherwise unit
shut down
Circuit shut down Automatic when pressure returns to
normal and if the same fault has not
occurred the same day (machine
equipped with CCN/clock board, If not,
manual)
As above As above
Circuit shut down Automatic when pressure returns to
normal and if the same fault has not
occurred the same day (machine
equipped with CCN/clock board, If not,
manual). The high pressure switch may
have to be reset.
As above As above
As above Manual. The high pressure switch may
have to be reset.
As above As above
Unit shut down Automatic if the same alarm has not
tripped the same day (machine equipped
with CCN/clock board, If not, manual)
Circuit shut down Manual
As above As above
None Automatic
As above As above
As above As above
As above As above
PROBABLE CAUSE
Compressor overheat
As above
As above
As above
Faulty thermistor, wiring error or
disconnection
As above
As above
As above
As above
As above
As above
Defective transducer, wiring fault
As above
As above
As above
Defective CCN/clock board
Bus wiring fault, wrong software in slave
board or defective slave board
As above
As above
As above
Shortage of refrigerant, filter blocked or
faulty pressure sensor
As above
Fan circuit fault, high condenser
entering air temperature
As above
The high pressure switch has not been
reset since the high pressure alarm was
reset, incorrect compressor wiring
As above
Low water flow or defective thermistor
Faulty pressure sensor, clogged filter or
low refrigerant charge
As above
Faulty transducer, high condenser
entering air temperature, high entering
water temperature, condenser fouled fan
flow rate too low.
As above
Pressure sensor faulty or heat
exchanger fouled
As above
33