El 01 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution) - Mars Comfort-Aire Century VCD-SA Series Service Manual

Service Manual - VCDxxSA
7.2

EL 01 (Indoor and Outdoor Unit Communication Error Diagnosis and Solution)

Description: Indoor unit can not communicate with outdoor unit
Recommended parts to prepare:
• Signal wires
• Magnet ring
• Indoor PCB
• Outdoor PCB
Troubleshooting and repair:
XYE Communication:
Power off, then restart the unit 2
Check whether there's any
Such as too many lamps, power
transformers? Or the signal wire
Check whether the signal wire is
shield cable or whether the
shield cable is earthing?
Check whether the signal wire is
Check whether the signal wires
Replace indoor main PCB, is the error
Replace the outdoor main PCB.
minutes later
Yes
interference.
is too long?
No
Yes
broken?
No
insert on PCB well?
Yes
distinguished?
No
 Troubleshooting 22
Remove interference or
Yes add magnet ring on power
wire
Adopt shield cable/Shield cable
No
earthing.
Yes Replace the signal wire.
No Pull out and insert back.
