Diagnostics, Beacon ii troubleshooting guide – Heatcraft Refrigeration Products II User Manual
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Diagnostics
Beacon II Troubleshooting Guide
PROBLEM
Step ACTION ITEM
IF OK
IF NOT OK
1.
Check Primary Power Supply Disconnect
1. Check fuses and circuit breakers
2.
Check Voltage to Evaporator Transformer
Go to
2. Check field wiring for breaks
LED is not lit.
3.
Check Transformer Secondary Output Volts
next step
3. Replace if necessary
4.
Check Voltage at Control Board (24V and C)
4. Check factory wiring and connections
5.
Replace Control Board
1.
Check Compressor internal overloads
1. Wait for reset
2.
Check Control Power to Condensing Unit
2. Check transformer voltage (secondary and
LED shows
Coo
, but
(24 Volts across “COMP” and “C” at board)
Go to
primary) and wiring of 208V power taps.
compressor will not run.
3.
Check Compressor Contactor Coil Voltage
next step
3. Check internal condensing unit wiring
4.
Check Compressor Contactor “pulled in”
4. Replace as needed
ERROR CODES:
E1
Room Sensor
Check Sensor and Board Connection
Replace as needed
E2
Defrost Sensor
Check Sensor and Board Connection
Replace as needed
E3
Suction Sensor
Check Sensor and Board Connection
Replace as needed
E4
Suction Transducer
Check Transducer and Board Connection
Replace as needed
E5 Outdoor Sensor
Check Sensor, wiring and Board Connection
Replace or remove
1.
Check Refrigerant Type
1. Compare board setpoint and refrigerant
2.
Check coil for ice
2. Defrost coil and check defrost cycle
settings/setpoints, defrost sensor and
heater amps.
E6
Low Superheat
3.
Check Control Board step position from board LED
3. Replace board if EEV steps not at 2.
During Cooling
4.
Check Electric Expansion Valve Closure
Go to
4. Pumpdown system see if LPS opens or if it
(0°F for 2 minutes)
next step
times out (EEV is bad or LPS is set
incorrectly, if times out) – See Pumpdown.
5.
Compressor Not Operating
5. Check overloads and contactor.
6.
Check Suction Temperature Sensor
6. Compare board sensor reading against
actual suction line temperature.
7.
Check Suction Pressure Transducer
7. Compare pressure reading against gauges.