Heatcraft Refrigeration Products 25001501 - Manual (Page 16)

BEACON CONTROLLER
16
FAULT OR PROBLEM THINGS TO CHECK
System runs 4 minutes then cycles off, then repeats 1. Check if sensors are connected correctly; if evaporator in/out
are switched, this will cause low superheat
2. Check if system is piped properly
3. System will cycle off if discharge line gets above 225
°
F
4. Check evaporator coil circuits if they are feeding evenly;
uneven feeding will cause flood-back
5. Check if expansion valve is correctly wired on Beacon board
6. Evap Coil temp too high; disconnect Evap Coil sensor to allow
system to run & lower temp; reconnect when temp lowered
7. Is the system wired properly between master & condensing unit
8. Check charge at 105
°
F; condensing sight glass should be full
9. Check fan cycling operation
System runs continuously 1. Check evaporator coil circuits if they are feeding evenly;
uneven feeding means coil is not being used fully
2. Check if red jumper wire (next to blue pot) is connected;
also check if terminals on red jumper wire are tight
3. Check if room sensor is connected
4. Check if system is properly charged with refrigerant
5. Is the system sized properly
6. Check system charge at 105
°
F condensing for full sight glass
System runs erratically 1. Check for low voltage condition; system will not operate
properly below 18 VAC
2. Check for high voltage condition; system will not operate
properly above 30 VAC
3. Check if expansion valve is correctly wired on Beacon board
4. Check “EVAP IN” & “EVAP OUT” sensors for proper operation
5. Is EEV wired properly
6. Is system charged properly
7. Check fan cycling operation
Sensor was changed but fault signal still appears 1. If a sensor is changed out, system power must be reset to
clear fault
System flashes low superheat fault 1. Check if “EVAP IN” & “EVAP OUT” sensors are correctly
installed on board & on copper tubing
2. Check evaporator coil circuits if they are feeding evenly;
uneven feeding will cause flood-back or sensors won’t sense
proper superheat
3. Check if system is piped correctly; incorrectly piped
system will cause system flood-back
4. Check if expansion valve is correctly wired on Beacon board
5. Expansion valve may be defective; check by running through
test mode
6. Check for proper charge at 105
°
condensing for full sight glass
System flashes low pressure, high pressure 1. If outdoor temperature is below 50
°
F, check to make sure
or oil pressure fault time delay is set at 2 minutes
2. If pumpdown switch is installed, check to make sure it is
wired correctly in the circuit
3. Check to make sure system is charged properly with
refrigerant
4. Check if expansion valve is operating properly
5. Check if expansion valve is correctly wired on Beacon board
6. Expansion valve may be defective
7. Check for flood back to the compressor
8. Check for proper piping & oil return
9. Possible bad low pressure, high pressure or oil pressure switch
10. Possible bad time delay or mis-wired
BEACON TROUBLE-SHOOTING GUIDE