Service diagnosis
35
Domestic air conditioner
10.3.3 Indoor DC fan motor malfunction
Indoor Display
E14
Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine
Malfunction abnormal fan motor operation
Detection
Malfunction when the detected rotation feedback signal don’t received in 2 minutes
Decision
Conditions
Supposed
Operation halt due to breaking of wire inside the fan motor.
Causes
Operation halt due to breaking of the fan motor lead wires
Detection error due to faulty indoor unit PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Check whether terminals
on indoor pcb is well ?
Electrify the machine again and turn it on in the cooling operation,
Measure voltage between the positions 1and 3 of Terminal CN5
on the indoor PCB
the voltage is about 90-220vac
check whether motor can run
when turn on the unit
the indoor motor is damaged and need replace
Yes
Measure whether there is voltage pulse (0-5VDC)
between the positions middle wire and black wire
of Terminal CN2 on the indoor PCB
the indoor pcb is damaged and need replace
Pull out the terminals on the indoor
mainboard and reinsert them.
Is it ok?
Summary of Contents for 1U35YEFFRA-C
Page 11: ...Pinping diagrams Domestic air conditioner 4ˊPiping diagrams 9 ...
Page 12: ...Operation range 10 Domestic air conditioner 5 Operation range 10 0 21 27 35 20 40 60 43 20 40 ...
Page 14: ...Functions and control 13 Domestic air conditioner Wiring diagrams OUTDOOR UNIT ...
Page 37: ...Service diagnosis 37 Domestic air conditioner ...
Page 56: ...57 Do C omestic air ircuit Diagra conditioner ams r ...
Page 59: ...Removal Procedure 1 Removal of Outdoor panel RPHVWLF LU RQGLWLR ...
Page 60: ...Removal Procedure 2 Domestic Air Condition ...
Page 61: ...4 Removal Procedure 3 Domestic Air Condition ...
Page 62: ...Removal Procedure 2 Removal of Electrical Box RPHVWLF LU RQGLWLR ...
Page 63: ...Removal Procedure 3 Removal of Fan and Fan Motor RPHVWLF LU RQGLWLR ...
Page 64: ...Removal Procedure 4 Removal of fan motor brcked and partition RPHVWLF LU RQGLWLR ...
Page 65: ...Removal Procedure 7 Domestic Air Condition ...
Page 66: ...Removal Procedure 5 Removal of compressor and heat exchanger RPHVWLF LU RQGLWLR ...