Energy Tech Laboratories DSH - Manual (Page 20)

JOHNSON CONTROLS
20
FORM 145.32-IOM1 (908)
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.
Status LED Status LED Description Status LED Troubleshooting Information
1. Low line voltage to compressor
2. Excessive liquid refrigerant in compressor
3. Compressor bearings are seized
1. Condensing unit power disconnect is open
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
1. Compressor fuse is open on one phase
2. Broken wire or connector on one phase
3. Compressor motor winding is damaged
4. Utility supply has dropped one phase
Yellow “ALERT”
Flash Code 7
Reverse Phase
LOCKOUT
1. Compressor running backward due to
supply phase reversal
1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module
1. Control circuit transformer is overloaded
2. Low line voltage to compressor
Yellow “ALERT”
Flash Code 9
Low Voltage
Control circuit < 18VAC
Yellow “ALERT”
Flash Code 5
Open Circuit
Yellow “ALERT”
Flash Code 8
Welded Contactor
Compressor always runs
Yellow “ALERT”
Flash Code 6
Missing Phase
LOCKOUT
Locked Rotor
LOCKOUT
Yellow “ALERT”
Flash Code 4