– 49 –
2. Outdoor unit is not working (but can receive signal from the remote controller).
Is voltage normal between pins 1 – 4 of the CN6 (Test-pin)?
❈
CN6 pin 3 has DC12V. Take care in handling of tester
pin to avoid any short-circuit with other pins when checking.
[
]
<
NORMAL
>
Indoor - Thermistor
Temperature
Voltage between
CN 1 – 4
20
°
C
about 2.5V
25
°
C
about 2.8V
30
°
C
about 3.1V
Yes
Is voltage normal between pins 1 – 5 of the CN6 (Test-pin)?
<
NORMAL
>
Heat exchanger
Thermistor Temperature
Voltage between
CN 1 – 5
20
°
C
about 2.5V
25
°
C
about 2.8V
30
°
C
about 3.1V
Check indoor thermistor, if it
is not in order, exchange
thermistor.
<
Normal
>
20
°
C
[
about 12.5k
25
°
C
[
about 10k
30
°
C
[
about 8k
Is LD301 of outdoor electrical
unit blinking 9 times?
Check heat exchanger
thermistor, if it is not in order,
exchange thermistor.
<
Normal
>
20
°
C
[
about 12.5k
25
°
C
[
about 10k
30
°
C
[
about 8k
Check outdoor electrical unit
and repair break-down parts
(around transmit circuit of
outdoor inter-face).
Q801 collector has indoor
transmission signal.
Check transmit circuit of
indoor inter-face and repair
break-down parts.
about 4V
0V
▲
38kHz about 2Vp–p
Transmission wave
Is LD301 of outdoor unit electrical
1 time blinking or lighting?
Exchange indoor control
circuit board.
Check outdoor unit according
to frequency of LD301 blinking
and repair the break-down
parts.
Check outdoor electrical unit
and repair break-down parts.
(around receiving circuit of
outdoor inter-face).
No
No
No
Yes
Yes
No
No
Yes
Yes
Yes
No
Summary of Contents for RAC-07CHV1
Page 64: ... 67 MEMO ...
Page 65: ... 68 MEMO ...
Page 66: ... 69 MEMO ...
Page 67: ... 70 MEMO ...
Page 68: ... 71 RAS 07CH1 RAC 07CHV1 PM NO 0079EG RAS 09CH1 RAC 09CHV1 Printed in Malaysia ...