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[
IX
Troubleshooting ]
4115
Power supply
sync signal ab-
normality
The frequency cannot be
determined when the
power is switched on.
(1) Power supply error
Check the voltage of the power sup-
ply terminal block (TB1).
(2) A fuse is blown
Check the fuses on the main board
(F01 and F02).
(3) Faulty wiring
Measure voltages of pin 5 of the
male connector (CN20) on the main
board and between pins 1 and 3 of
the male connector (CN21) on the
main board.
If the voltage (AC208/230V) is not
the same as the power supply volt-
age, the wiring is faulty.
(4) Main board failure
If none of the items described above
is applicable, and if the trouble reap-
pears even after the power is
switched on again, replace the MAIN
board.
4116
Motor abnor-
mality
1. LOSSNAY
The motor keep running
even if the power is OFF.
The thermal overload re-
lay is ON. (Only for the
three-phase model)
2. Indoor unit
If detected less than
180rpm or more than
2000rpm, the indoor
unit will restart and
keep running for 3
minutes.If detected
again, the display will
appear.
(1) Board failure
Replace the board.
(2) Motor malfunction
(3) Solenoid switch malfunc-
tion
Check for the motor and the solenoid
switch.
Error Code
Error definition and error
detection method
Cause
Check method and remedy
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