Sinclair ASC-60AN, Service Manual

Page: 72 / 96

Troubleshooting
2.3. Solving steps for typical malfunction
(1) For indoor unit
a. Communication malfunction between indoor and outdoor units(E1)
No
Power off, then turn on the unit 5
seconds later(reconnect the
power wire).Is the error still
displaying after several minutes?
Check whether the signal wire is
shield cable or whether the shield
cable is earthing?
Adopt shield cable/Shield
cable earthing.
Check whether the wire is correct
polarity? P to P, Q to Q, E to E?
No
Yes
Correct the connection. No
Check if there’s any interference.
Such as too many lamps, power
transformers? Or the signal wire is
too long?
Yes
Remove interference.
Increase the capacity of anti-
interference
Yes
Check whether the signal wire is
broken?
Yes
Replace the signal wire. Yes
Check whether the signal wires
insert on PCB well?
Pull out and insert back. No
No
Replace indoor PCB, is the error
distinguished?
Yes
Replace the outdoor PCB.
No
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