Expansion Valve Capacity; Diagnostics - Heatcraft Refrigeration Products H-IM-79D Installation & Operation Manual

Part Number Valve
29320003 ESVB-1
29320004 ESVB-4
29320007 - 08 ESVB-10
29320013 ESVB-15
29320014 ESVB-20
Beacon II Troubleshooting Guide
PROBLEM Step ACTION ITEM
1.
2.
LED is not lit. 3.
4.
5.
1.
2.
LED shows Coo , but
compressor will not run. 3.
4.
ERROR CODES:
E1
Room Sensor
E2
Defrost Sensor
E3 Suction Sensor
E4 Suction Transducer
E5
Outdoor Sensor
1.
2.
E6 Low Superheat 3.
During Cooling 4.
(0 F for 2 minutes)
5.
6.
7.

Expansion Valve Capacity

R-22
Evaporator Temperature ( F.)
+20
Pressure Drop Across Valve (psi)
100 BTUH
0.68 8160 0.64
3.27 39240 3.07
8.02 96240 7.54
15.14 181680 14.25
22.18 266160 20.87

Diagnostics

Check Primary Power Supply Disconnect
Check Voltage to Evaporator Transformer
Check Transformer Secondary Output Volts
Check Voltage at Control Board (24V and C)
Replace Control Board
Check Compressor internal overloads
Check Control Power to Condensing Unit
(24 Volts across "COMP" and "C" at board)
Check Compressor Contactor Coil Voltage
Check Compressor Contactor "pulled in"
Check Sensor and Board Connection
Check Sensor and Board Connection
Check Sensor and Board Connection
Check Transducer and Board Connection
Check Sensor, wiring and Board Connection
Check Refrigerant Type
Check coil for ice
Check Control Board step position from board LED
Check Electric Expansion Valve Closure
Compressor Not Operating
Check Suction Temperature Sensor
Check Suction Pressure Transducer
-20
Pressure Drop Across Valve (psi)
100 BTUH 100
7680 0.48
36840 2.31
90480 5.65
171000 10.69
250440 15.65
IF OK
Go to
next step
Go to
next step
Go to
next step
24
R-404A / R-507
Evaporator Temperature ( F.)
+20 -20
BTUH 100
5760 0.42
27720 2.05
67800 5.01
128280 9.47
187800 13.86
IF NOT OK
1. Check fuses and circuit breakers
2. Check field wiring for breaks
3. Replace if necessary
4. Check factory wiring and connections
1. Wait for reset
2. Check transformer voltage (secondary and
primary) and wiring of 208V power taps.
3. Check internal condensing unit wiring
4. Replace as needed
Replace as needed
Replace as needed
Replace as needed
Replace as needed
Replace or remove
1. Compare board setpoint and refrigerant
2. Defrost coil and check defrost cycle
settings/setpoints, defrost sensor and
heater amps.
3. Replace board if EEV steps not at 2.
4. Pumpdown system see if LPS opens or if it
times out (EEV is bad or LPS is set
incorrectly, if times out) – See Pumpdown.
5. Check overloads and contactor.
6. Compare board sensor reading against
actual suction line temperature.
7. Compare pressure reading against gauges.
BTUH
5040
24600
60120
113640
166320