Alarm Codes - Carrier 040-420 Installation And Service Manual

Alarm Codes -

Following is a detailed description of
each alarm code error and possible cause. Manual reset of
an alarm is accomplished by moving LOCAWENABLE-
STOP-CCN Switch to STOP position, then back to LO-
CAL or CCN position. See Table 14 for listing of each alarm
code.
Code 0 No alarms exist
Codes 1 - 8 Compressor failure
If DSIO-LV or -EXV relay module control relay feed-
back switch or signal is sensed as open during operation of
a compressor, microprocessor detects this and stops com-
D E S C R I P T I O N
DISPLAY
No Alarms Exist
0
1 Compressor Al failure
Compressor A2, A3, A4 failure
2 , 3 , 4
5 Compressor Bl failure
Compressor B2; 83, 84 failure
9 Leaving water thermistor failure
1 0 Entering water thermistor failure
Compressor Al sensor failure
1 9
Compressor sensor failure
2 0
2 1 Reset thermistor failure
2 2 Discharge pressure transducer failure, circuit A
2 3 Discharge pressure transducer failure, circuit B
2 4 Suction pressure transducer failure, circuit A
Suction pressure transducer failure, circuit B
2 5
2 6 Oil pressure transducer failure, circuit A
2 7 Oil pressure transducer failure, circuit
2 8 Transducer supply voltage low
2 9 Interlock switch oaen
4-20 mA reset input failure
3 0
3 2 Loss of communication with DSIO-LV
3 3 Loss of communication with DSIO-EXV
3 4 Loss of communication with 4 In/4 Out module
3 5 Not used
Low refrigerant pressure circuit A
3 6
3 7 Low refrigerant pressure circuit B
3 8
3 9
4 0 oil pressure circuit A
4 1 oil pressure c i r c u i t B
4 2 Cooler freeze protection
Low cooler water flow
4 3
4 4 Low suction temperature circuit A
4 5 Low suction temperature circuit B
4 6 High suction superheat circuit A
4 7 High suction superheat circuit B
4 8 Low suction superheat circuit A
4 9 Low suction superheat circuit B
Illegal configuration
5 1 Initial configuration required
Emergency stop by CCN command
5 2
L E G E N D
pressor, energizes alarm light, and displays a code of I, 2,
3, 4, 5, 6, 7, or 8 depending on the compressor. Compres-
sor locks off; to reset, use manual reset method.
If lead compressor in a circuit shuts down, the other com-
pressors in the circuit stop and lock off. Only the alarm
mode for lead compressor is displayed.
The microprocessor is also programmed to indicate com-
pressor failure if feedback terminal on DSIO-LV or -EXV
supposed to be on.
Table 14 - Alarm Codes
ACTION TAKEN C K T
B Y C O N T R O L
Circuit A shut down N o
Compressor shut down Yes
Circuit B shut down N o
Compressor shut down
Unit shut down Yes
Unit shut down Yes
Circuit A shut down Yes
Circuit B shut down Yes
Normal set point used N o
Circuit A shut down
Circuit B shut down Yes
Circuit A shut down N o
Circuit B shut down N o
Circuit A shut down N o
Circuit B shut down
N O
Unit shut down N o
Unit shut down N o
Normal set point used N o
Demand limit ignored N o
Unit shut down N o
Unit shut down N o
Unit shut down Yes
I
N o
N o
N o
N o
Circuit A shut down N o
Circuit B shut down N o
Unit shut down N o
Unit shut down N o
N o
Circuit A shut down
after 10 minutes
Circuit B shut down N o
afler 10 minutes
Circuit A shut down Yes
Circuit B shut down Yes
Circuit A shut down Yes
Circuit 6 shut down Yes
Unit cannot start
Unit cannot start
Unit shut down Yes
*Reset automatic first time, manual if repeated same day
49
PROBABLE CAUSE
Manual High-pressure switch trip, discharge gas
thermostat trip, or wiring error
Manual CPCS Ground Fault Protection
Manual
Manual
A u t o
A u t o
Thermistor or transducer failure
A u t o
or wiring error.
A u t o
A u t o
Auto.
A u t o
A u t o
Transducer failure or wiring error
Auto.
Auto.
A u t o
A u t o Unit voltage low or PSI faulty
Chilled water pump inoperative
M a n u a l
A u t o
A u t o
Wiring error or faulty module
Auto.
or improper address code
A u t o
A u t o
Low refrigerant charge, plugged filter
drier, faulty EXV
*
Low refri erant charge, plugged filter
drier. fau tv EXV
Manual Faulty EXV, transducer, or thermistor
M a n u a l Faultv EXV, transducer, or thermistor.
Manual Low oil level, circuit breaker trip,
faulty EXV, crankcase heater,
or Pressure Transducer
Manual Low oil level, circuit breaker trip,
fautty EXV, crankcase heater,
or oressure transducer
Low water flow or faulty thermistor
Manual Chilled water pump failure
or faulty thermistor
Manual Faulty EXV or thermistor
M a n u a l Faulty EXV or thermistor
Manual Low charge, faulty EXV or
thermistor, or plugged filter drier
Manual Low charge, faulty EXV or
thermistor, or plugged filter drier.
M a n u a l Faulty EXV or thermistor
Manual Faultv EXV or thermistor
Manual Configuration error
Configuration omitted
M a n u a l
Network command.
C C N