Heatcraft Refrigeration Products H-IM-79E Refrigerator User Manual


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26
BeaconIITroubleshootingGuide(continued)
Master
in out
Slave 1
in out
Slave 2
in out
Slave 3
in out
1
2
3
in out
Master
in out
Slave 1
in out
Slave 2
in out
1
2
3
5
Slave 3
in out
4
Diagnostics
BeaconIISmart
Controller
4
PROBLEM Step ACTION ITEM IF OK IF NOT OK
E9 Multi-out to Multi-in 1. Check for 24 volts power to the board 1. If no voltage, see “LED is not lit” above
Communication Wiring for low voltage, see “88888 LED display”
(only shows after initial 2. Check for crossed communication wiring Go to 2. Correct wiring from “Master” unit Multi-out
successful connection) (multi-out not wired to multi-in terminals) next step to Multi-in of “Slave” unit, etc. to all Slaves
and return to Master. (See wiring diagrams)
3. Check for broken communication wiring 3. Correct wiring between rst Slave with
error to previous board in the sequence.
(E9 continued)
Communication Error
Occurrence:
Break in the designated
lines will cause errors
as follows:
Line # Master Slave1 Slave 2 Slave 3
1 E9 E9 E9 E9
2 E9 no error E9 E9
3 E9 no error no error E9
4 E9 no error no error no error
[With Beacon II Smart Controller]
Line# SMART Master Slave1 Slave2 Slave3
1 +COMM+ E9 no error no error no error
2 +COMM+ no error E9 E9 E9
3 +COMM+ no error no error E9 E9
4 +COMM+ no error no error no error E9
5 +COMM+ no error no error no error no error
PROBLEM Step ACTION ITEM IF OK IF NOT OK
888 LED display 1. Check Voltage to Evaporator Transformer 1. Check eld wiring for breaks or shorts
(power is below 18V and 2. Check Transformer Secondary Output Volts Go to 2. Replace if necessary
appears at initial power) 3. Check Voltage at Control Board (24 and C) next step 3. Check factory wiring and connections
4. Check Voltage at Beacon II Smart Controller 4. Check eld wiring from board
1. Check for low voltage 1. Check all steps for “888 LED display”
LED displays dLy Go to Voltage could drop off too fast to show.
then oFF with no 2. Check for short in eld wiring from “comp” on next step. 2. Check internal factory wiring to
displayed errors board to condensing unit terminal connection compressor contactor.
3. Replace defective contactor (holding coil)
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