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Beacon II Troubleshooting Guide (continued)
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 first 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
1E9 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 field 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 field 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 field 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)
Master
in out
Slave 1
in out
Slave 2
in out
Slave 3
in out
1
2
3
4
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