-
258
-
(i)
How to make sure of remote control
Note (1) Check method of remote control
(a)
Press the reset switch of the remote control.
(b)
If all LCD are displayed after one (1) display, it is basically normal.
(1)
Is remote
control normal?
YES
Again pushing
operating switch
Operating the unit?
NO
Does unit ON/OFF
button operates?
Operating the unit.
NO
NO
YES
YES
Remote control
defects
Abnormality is not
found.
Replace the display.
Control problem on
main unit
Is the unit
operable with remote
control?
Defective remote
control
NO
YES
Normal
(ii)
Indoor unit fan motor check procedure
This is a diagnostic procedure for determining if the indoor unit’s fan motor or the circuit board is broken down.
1) Indoor unit printed circuit board output check
a) Turn off the power.
b) Remove the front panel, then disconnect the fan motor lead wire connector.
c) Turn on the power. If the unit operates when the ON/OFF button is pressed, if trouble is detected after the voltages in
the following figure are output for approximately 30 seconds, it means that the circuit board is normal and the fan
motor is broken down.
If the voltages in the following figure are not output at connector pins No.
1
,
4
and
5
, the indoor unit’s circuit
board has failed and the fan motor is normal.
(ii) DC Fan motor resistance check
Notes (1) Remove the fan motor and measure it without power connected to it.
Notes
(2) If the measured value is below the value when the motor is normal, it means
that the fan motor is faulty.
1
2
3
4
5
6
1
2
3
4
5
6
FM
I
DC15V
Indoor unit
circuit board
DC 308~336V
DC several V
(4~6 V)
CNU
(–)
GND
Blue
Y
ello
w
White
Blac
k
Red
Measuring Point
Resistance when Normal
1
–
3
(Red – Black)
25 M
Ω
or higher
4
–
3
(White – Black)
30 k
Ω
or higher
Summary of Contents for SRK56CE-S1
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