Service manual

Troubleshooting Based on Equipment Condition Si42-107
72 Troubleshooting
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4:";
Possibly faulty electric wiring
or relay etc.
Turn on power switch or replace
fuse.
Wait until power returns.
Check remote controller contact
Malfunction of MgS coil or MgS
contact replace the MgS switch.
Malfunction of K1R relay and
replace it.
Check the faulty insulation parts or
wiring.
Check electric wiring or relay etc.
Malfunction or actuation of safty
device such as:
· indoor fan motor protection
thermostat or over current relay
· Compressor overload relay or
protection thermostat
· Discharge pipe thermostat switch
· High pressure switch or Low
pressure switch
Is power
switch OFF or fuse
for control circuit
blown?
Is the
power supply
between terminal C-D
(or 3) from remote
controller?
Is there
power outage?
NO
NO
Is the
power supply
on MgS "K1M or K2M"
coil of indoor
fan motor?
YES
Is the
power supply
to Relay "K1R" coil of
indoor or outdoor
unit? ∗Note
NO
Is there
any malfunction
or actuation of safty
devices?
NO
Is the
sufficient insulation
in electric system?
NO
YES
YES
NO
YES
YES
YES
YES
NO
∗ K1R relay rocated on indoor unit for
FD03·04·05K and outdoor unit for
FD06·08·10K
(P1269)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.