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Verfügbare Sprachen
Verfügbare Sprachen
3.
__Only the indoor unit fan does not operate (other functions are normal).
Is
a
voltage
of
DC25v-35v) YES
Is a voltage of DC 5V generated
generated
between
pins @ (Blue)
between
pins @ (Blue)
and
@®
and © (Red) of CN10 when operated
(Yellow) of CN10?
in the "HIGH" fan speed mode?
NO
shorted and replace REG3.
YES
ls
a
pulse
of
about
33Vp—p| N
generated at the collector of Q904 in =
Is the
resistance
between
L901
the fan operation mode?
terminals 1 © or less?
Is the voltage
collector
of Q904
approx. 0 V at this time?
SS"
L901.
Is
the
fan
PWM
(Pulse
Width ais
Modulation) output (pin 62) of micro
computer set to "Hi" or is the pulse
waveform output when operated in
the fan operation mode?
NO
Replace the micro computer.
Perform a final check of operation.
Replace Q904.
YES
The fan speed of the indoor unit fan cannot be changed
(other functions are normal
YES
The fan cannot be stopped by the =. Is the fan PWM output (pin 6) of the => Replace the micro computer.
remote controller.
micro computer set to "Hi"?
No
Wy,
;
YES
Is the voltage collector of Q904 =
Replace Q904.
approx. 0V?
| NO
,
Replace Q903.
Replace the micro computer.
Perorm a final check of operation.
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