Carrier 040-420 specifications Alarm Codes

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-

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 53 terminal strip receives voltage when compressor is not supposed to be on.

Table 14 - Alarm Codes

DISPLAY

D E S C R I P T I O N

ACTION TAKEN

C K T

PROBABLE CAUSE

B Y

C O N T R O L

PUMPDOWN

-

-

0

No Alarms

Exist

-

-

1

Compressor Al failure

Circuit

A

shut

down

No

Manual

High-pressure switch trip, discharge gas

thermostat trip, or wiring error

2, 3,

4

Compressor A2, A3, A4 failure

Compressor

shut

down

Yes

Manual

CPCS

Ground

Fault

Protection

5

Compressor Bl failure

Circuit

B

shut

down

No

Manual

6, 7,

8

Compressor B2; 83, 84 failure

Compressor

shut

down

Yes

Manual

9

Leaving

water

thermistor

failure

Unit

shut

down

Yes

Auto

I

1 0

Entering

water

thermistor failure

Unit

shut

down

Yes

Auto

Thermistor

or

transducer failure

1 9

Compressor Al sensor failure

Circuit

A

shut

down

Yes

Auto

or wiring error.

2 0

Compressor

Bl

sensor

failure

Circuit

B

shut

down

Yes

Auto

2 1

Reset

thermistor

failure

Normal

set

point

used

N o

Auto

2 2

Discharge pressure transducer failure, circuit A

Circuit

A

shut

down

Yes

Auto.

2 3

Discharge pressure transducer failure, circuit B

Circuit

B

shut

down

Yes

Auto

2 4

Suction pressure transducer failure, circuit A

Circuit

A

shut

down

N o

Auto

Transducer failure or wiring error

2 5

Suction pressure transducer failure, circuit B

Circuit

B

shut

down

N o

Auto.

2 6

Oil pressure transducer failure, circuit A

Circuit

A

shut

down

N o

Auto.

2 7

Oil pressure transducer failure, circuit

B

Circuit

B

shut

down

N O

Auto

2 8

Transducer

supply

voltage

low

Unit

shut

down

N o

Auto

Unit voltage low or PSI faulty

2 9

Interlock

switch

oaen

Unit

shut

down

N o

Manual

Chilled

water

pump

inoperative

3 0

4-20

mA

reset

input

failure

Normal

set

point

used

N o

Auto

31

4-20

mA

demand limit failure

Demand

limit

ignored

N o

Auto

3 2

Loss of communication with DSIO-LV

Unit

shut

down

N o

Auto.

I

Wiring error or

faulty

module

3 3

Loss of communication with DSIO-EXV

Unit

shut

down

N o

Auto

or improper address

code

3 4

Loss

of

communication with

4 In/4

Out module

Unit

shut

down

Yes

Auto

3 5

Not

used

-

-

-

I

-

*

3 6

Low refrigerant pressure circuit A

No

Low refrigerant charge, plugged filter

*

drier,

faulty

EXV

3 7

Low refrigerant pressure circuit B

No

Low refri erant charge, plugged filter

drier. fau I” tv EXV

~,

3

3 8

No

Manual

Faulty EXV, transducer, or thermistor

3 9

No

Manual

Faultv EXV, transducer, or thermistor.

4 0

oil

pressure

circuit

A

Circuit

A

shut

down

N o

Manual

Low oil level, circuit breaker trip,

faulty

EXV,

crankcase

heater,

or Pressure Transducer

4 1

oil

pressure

circuit

B

Circuit

B

shut

down

No

Manual

Low oil level, circuit breaker trip,

fautty

EXV,

crankcase

heater,

or oressure

transducer

4 2

Cooler

freeze

protection

Unit

shut

down

No

Low water flow or faulty thermistor

4 3

Low cooler water flow

Unit

shut

down

No

Manual

Chilled

water

pump failure

or faulty

thermistor

4 4

Low suction temperature circuit A

Circuit

A

shut

down

No

Manual

Faulty

EXV

or

thermistor

after

10

minutes

4 5

Low suction temperature circuit B

Circuit

B

shut

down

N o

Manual

Faulty

EXV

or

thermistor

afler 10 minutes

4 6

High suction superheat circuit A

Circuit

A

shut

down

Yes

Manual

Low charge, faulty EXV or

I thermistor, or plugged filter drier

4 7

High suction superheat circuit B

Circuit

B

shut

down

Yes

Manual

Low charge, faulty EXV or

thermistor, or plugged filter drier.

4 8

Low suction superheat circuit A

Circuit

A

shut

down

Yes

Manual

Faulty

EXV

or

thermistor

4 9

Low suction superheat circuit B

Circuit 6 shut down

Yes

Manual

Faultv

EXV

or

thermistor

50

Illegal

configuration

Unit

cannot

start

-

Manual

Configuration

error

5 1

Initial

configuration

required

Unit

cannot

start

-

Manual

Configuration

omitted

5 2

Emergency stop by CCN command

Unit

shut

down

Yes

C C N

Network

command.

LEGEND

*Reset

automatic first

time, manual if repeated same day

-Compressor Protection Control Module ES - Power Supply

49