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Service Manual
(8) Communication malfunction: (following AP1 for outdoor unit control board)
Mainly detect:
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N
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Start
Did the equipment operate
normally before the failure
occurs?
The AP1 voltage
detection circuit
is at fault
Check wiring inside of
the indoor and outdoor
units
Are wires broken?
Check the communication
circuit of the outdoor unit
If the fault is eliminated?
The communication
circuit is abnormal
Replace the main board
of the indoor unit
End
If the fault is eliminated?
Replace the main board
AP1 of the outdoor unit
If the fault is eliminated?
Is the connection right?
Check the wiring of the indoor and
outdoor units with reference to the
wiring diagram
Correctly connect the
corresponding wires for
the indoor and outdoor
units with reference to
the wiring diagram
53
Summary of Contents for Emerald SC-09WGLD-HP230
Page 1: ...Service Manual SC 09ZGLD HP230 SC 09WGLD HP230 SC 12ZGLD HP230 SC 12WGLD HP230 1...
Page 43: ...Service Manual 3 Malfunction of Protection of Jumper Cap C5 43...
Page 56: ...Service Manual 10 Exploded View and Parts List 10 1 Indoor Unit 56...