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

Page 49
Image 49
Carrier 040-420 specifications Alarm Codes, Action Taken Probable Cause N T R O L

040-420 specifications

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