FORM 145.32-IOM1 (908)

 

 

 

 

 

 

 

 

 

 

 

Status LED

Status LED Description

 

Status LED Troubleshooting Information

 

 

 

1.

Low line voltage to compressor

 

Yellow “ALERT”

Locked Rotor

 

 

 

2.

Excessive liquid refrigerant in compressor

 

Flash Code 4

LOCKOUT

 

 

 

 

 

 

 

 

 

 

 

3.

Compressor bearings are seized

 

 

 

 

 

Yellow “ALERT”

Open Circuit

1. Condensing unit power disconnect is open

 

Flash Code 5

 

 

 

 

 

 

2.

Compressor circuit breaker or fuses are open

 

 

 

 

 

 

 

 

3.

Compressor contactor has failed open

 

 

 

 

 

 

 

 

4.

High pressure switch is open and requires manual reset

 

 

 

 

 

 

 

 

5.

Broken supply wires or connector is not making contact

 

 

 

 

 

 

 

 

6.

Unusually long compressor protector reset time due to

 

 

 

extreme ambient temperature

 

 

 

7.

Compressor windings are damaged

 

 

 

 

 

Yellow “ALERT”

Missing Phase

1. Compressor fuse is open on one phase

 

Flash Code 6

LOCKOUT

 

 

 

 

 

 

 

 

 

 

2.

Broken wire or connector on one phase

 

 

 

 

 

 

 

 

3.

Compressor motor winding is damaged

 

 

 

 

 

 

 

4. Utility supply has dropped one phase

 

 

 

 

 

Yellow “ALERT”

Reverse Phase

1. Compressor running backward due to

 

Flash Code 7

LOCKOUT

 

supply phase reversal

 

Yellow “ALERT”

Welded Contactor

1. Compressor contactor has failed closed

 

Flash Code 8

Compressor always runs

 

 

 

 

 

2.

Thermostat demand signal not connected to module

 

 

 

 

 

Yellow “ALERT”

Low Voltage

1. Control circuit transformer is overloaded

 

Flash Code 9

Control circuit < 18VAC

 

 

 

 

 

2.

Low line voltage to compressor

 

 

 

 

 

 

Flash code number corresponds to a number of LED flashes, followed by a pause and then repeated.

TRIP and ALERT LED’s flashing at the same time means control circuit voltage is too low for opera- tion.

Resetting Alert Codes

Alert codes can be reset manually and automatically. The manual method to reset an Alert code is to cycle the power to Comfort Alert off and on. For automatic reset, Comfort Alert continues to monitor the compressor and system after an Alert is detected. If conditions return to normal, the Alert code is turned off automatically. ALERT codes that result in a compressor lock out can only be reset manually. ALERT codes that result in a lockout can only be reset manually.

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JOHNSON CONTROLS

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Energy Tech Laboratories DSH installation instructions Low line voltage to compressor

DSH specifications

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