Outdoor Unit Communication Pcb Parallel Communication Error - Fujitsu Airstage V-II Service Manual

Trouble shooting 25
OUTDOOR UNIT Error Method:
Outdoor Unit Communication PCB
Parallel Communication Error
Detective Actuators:
Outdoor unit Main PCB
Forecast of Cause :
1. Wrong terminal resistor set in the transmission segment
2. Noise
4. Communication PCB defective
Check Point 1 : Check the terminal resistor setting
No terminal resitor set in the single network segment
Dual terminal resitor set in the single network segment
DIP SW SET5-4 OFF: Disable (Factory setting)
ON : Enable
OK
Check Point 2-1 : Turn the power
on again.
Error displayed again?
YES
Check Point 3 : Check the communication PCB connection
Communication PCB connection check
OK
Check Point 4 : Check the communication PCB
Communication PCB check
OK
Check Point 5 : Replace Main PCB
Change Main PCB and set up the original address.
(Refer to 06-03 page Main PCB removal.)
Indicate or Display:
Outdoor Unit : E. 69. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Error Code : 69
Detective details:
Parallel communication (communication between master PC and Neuron
Chip) failed 5 times.
3. Communication PCB connection defective
5. Main PCB defective
Check Point 2-2 : Noise
NO
Check if ground is connection correctly or there are
no related cables near the power line.
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