5-8
Troubleshooting
5-3-10 (N) Check of instantaneous over-current protection of IPM circuit.
Inverter instantaneous over- c u r r ent protection mode is the mode to be actuated in order to
p revent the damage of elements from the peak current of IPM circuit elements.
In case that the inverter circuit instantaneous over- c u r r ent protection mode actuates.
(condition of installation)
♦The ventilation is not good because the outdoor unit is installed wrong (the ambient tempera-
t u r e is higher than 50 (°C) )
-> Reinstall the outdoor unit so that the good ventilation can be made.
♦In case that the operation is made with the cover bent of the outdoor unit.
-> Take out the cover.
♦If two outdoor units are operating face to face, (the bad ventilation is made)
-> Reinstall the outdoor unit for the good ventilation.
♦The air circulation is bad due to the attachment of falling leaves.
-> Take away the leaves for the good ventilation.
♦If the Refrigerant is overc h a rged.
-> Check the amount of Refrigerant.
(Unit defect)
♦If the comp is locked.
-> Replace the comp.
♦If the comp is operating without the revolution of fan motor.
-> Check the fan motor connector and replace the fan motor.
♦In case the parts of the control board is damaged.
-> Replace simultaneously the inverter control board and the IPM board .
5-3-11 (O) Check of the comp discharge gas temperature and OLP temperature abnormal rise.
If the comp discharge gas temperature and OLP t e m p e r a t u re rises higher than a certain level, it
p r otects the circ u i t .
If the comp discharge gas temperature and OLP t e m p e r a t u re rises abnormally,
(Condition of installation)
♦The ventilation is not good because the outdoor unit is installed wrong (the ambient tempera-
t u r e is higher than 50 (°C) )
-> Reinstall the outdoor unit so that the good ventilation can be made.
♦In case that the operation is made with the cover bent of the outdoor unit.
-> Take out the cover.
♦If two outdoor units are operating face to face, (the bad ventilation is made)
-> Reinstall the outdoor unit for the good ventilation.
♦The air circulation is bad due to the attachment of falling leaves
-> Take away the leaves for the good ventilation.
♦If the refrigerant is insufficient.
-> Fill up the amount of re f r i g e r a n t .
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