Sanyo SAP-KRV91EH Technical & Service Manual page 34

(continued)
Indication on Indoor Unit
People
Timer Operation
Sensor
NOTE
Operation lamp flashes upon errors being detected by sensor, while it flashes to indicate protective actions after error
mode occurs more than four times during operation.
Microcomputer ceases to operate and operation lamp goes out if terminal fuse blows on the terminal block on the indoor
unit PCB.
10-2-3. Self-Diagnosis Function Fails to Work
...Off
Details of Diagnosis
Abnormality in external ROM of outdoor unit
Electric current peak cut-off (20A)
Wrong voltage, AC voltage abnormality
Active abnormality
Compressor discharge gas overheating
protection
Indoor fan motor rotation abnormality
Abnormality on switching 4-way valve
Zero-cross abnormality
Compressor motor revolution abnormality
Outdoor fan motor rotation abnormality
Check indoor unit.
Is the fuse blown?
OK
Replace controller.
...Flashing
Forgot to attach OTP data
Incorrect insertion
Defective OTP data
Defective contact of IC socket
Instantaneous power failure/voltage reduction
Defective HIC
Worn compressor
Compressor operation stop, abnormality on voltage
application
Gas shortage during heating/cooling operation
(more than 50% gas shortage)
Blocked electronic expansion valve or capillary tube
Defective compressor temp. sensor
Outdoor fan motor fails to rotate during cooling
operation
Defective fan motor position locating sensor,
disconnection of fan motor winding
Disconnected connector
Defective fan motor drive circuit
4-way valve does not switch
Abnormality on control PCB
Failure in DC compressor rotation which is not
caused by defective HIC
Disconnected outdoor DC fan motor
Locked
Defective PCB
No lamp comes on and indoor fan fails to rotate.
Check that power plug is in receptacle.
Check the power voltage.
Yes
Replace PCB or fuse.
30
...Illuminated
Details of Abnormality