268
Trouble Shooting Guide
Self-diagnosis function
No
Check or replace current detection
sensor or inverter PCB
Yes
Is the current normal?
No
Check the outdoor, indoor unit fan.
Yes
Is the outdoor/indoor
unit fan normal?
No
Check input power.
Yes
Is input power normal?
No
Check the LEV of outdoor/indoor unit
and Check valve
Yes
Is the LEV of outdoor/indoor unit and
Check valve normal?
No
No
Replace the compressor.
Yes
Check pipe clogging or refrigerant
Is insulation
resistance or coil resistance of
compressor normal?
No
Replace the compressor
Yes
Yes
Is the compressor
stopped? or is there any abnormal
vibration?
Is there shielding?
Measure actual current.
• Remove shielding of the outdoor unit
• Check the indoor unit filter
Failure Checking Method
Fault diagnosis and Trouble shooting guide
22
Error Item
Error
Display No.
Major Error Occurrence Cause
Meaning
Maximum over
current (MAX CT)
or minimum
current
Over current or
minimum current flows
• Pulled out or loose of inverter compressor
terminal
• Defective compressor
• Clogging of pipe
• Defective current detection sensor
• Low/high input voltage
• Failure of outdoor/indoor fan
• Excessive charge of refrigerant
• Failure of outdoor/indoor LEV/Check Valve
• Shielded (Outdoor unit shielded on cooling mode/
Indoor unit filter clogged on heating mode)
Summary of Contents for multi V PLUS
Page 21: ...Service Manual 21 Indoor Unit Indoor Units ...
Page 74: ...74 Indoor Unit ...
Page 86: ...86 Indoor Unit ...
Page 142: ...142 Indoor Unit ...
Page 160: ...160 Indoor Unit ...
Page 179: ...Service Manual 179 Outdoor unit ...
Page 239: ...Service Manual 239 Wiring Diagrams 5 8 60Hz 220V Main Outdoor Unit 8HP 10HP 12HP ...
Page 245: ...Service Manual 245 Trouble shooting guide ...
Page 296: ...296 Trouble Shooting Guide ...
Page 297: ...Service Manual 297 Appendix ...
Page 303: ...Service Manual 303 Exploded View Replacement Parts List ...