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42
Installation and Maintenance
Service Manual
Troubleshooting
for U8 malfunction
Re-energize1
minute after
de-erergization
U8 is still
displayed
The unit returns to normal.
Conclusion:U8 is displayed due
to instant energization afte de-
energization while the capacitor
discharges slowly.
The zero-cross detection
circuit of the mainboard is
defined abnormal.Replace
the mainboard with the same
model
End
No
Yes
5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8
Summary of Contents for ASH-09AIM PT
Page 1: ...SERVICE MANUAL ASH 09AIM PT ASH 13AIM PT MATRIX SERIE ...
Page 2: ......
Page 12: ...7 Technical Information Service Manual 596 354 838 899 303 378 550 Unit mm ASH 13AIM PT ...
Page 79: ......
Page 80: ...PARTS GUIDE MATRIX SERIE ASH 09AIM PT ASH 13AIM PT ...
Page 82: ...Service Manual Exploded View and Parts List ASH 09AIM PT ...
Page 84: ...Service Manual ASH 13AIM PT ...
Page 86: ...Service Manual Outdoor Unit ASH 09AIM PT ...
Page 88: ...Service Manual ASH 13AIM PT ...