Troubleshooting 44 - Outdoor Unit Error Method: Communication Error Between Outdoor Units - Fujitsu Airstage V series Service Manual

Trouble shooting 44
OUTDOOR UNIT Error Method:
Communication Error between
Outdoor Units
Detective Actuators:
Outdoor Unit Controller PCB circuit
Forecast of Cause : 1. Connection failure 2. Outside cause 3. Transmission PCB failure 4. Controller PCB failure
Check Point 1 : Check Power Supply
p Isn't the breaker off?
p Check loose or removed connection cable.
OK
Check Point 2 : Check connections
Upon turning off power, check and correct followings.
p Check connections between each outdoor units. (Check loose or removed wiring of Communication Cable)
p Check if the connection between Outdoor Controller PCB and Transmission PCB in each Outdoor Units are loose.
OK
Check Point 3 : Replace Transmission PCB
If the symptom does not change by above Check 1, 2, replace Transmission PCB.
OK
Check Point 4 : Replace Controller PCB
If the symptom does not change by above Check 1,2,3, replace Controller PCB and
set up the original address.
Indicate or Display:
Outdoor Unit : LED1 Flash, LED5
Indoor Unit : Operation LED Flash, Timer LED 3 Times Blink
ERROR CODE : E : 32
Detective details:
In case of Main Unit : When the number of connected Slave Unit does not
match to the number of Slave Unit that can be recognized by the
communication, and this condition continued for longer than 5 minutes after
starting operation.
In case of Slave Unit : When the communication from the Main Unit in the
same refrigerant system was not received for longer than 5 minutes after
starting operation.
06-54
8 Times Blink
Swing LED 3 Times Blink