76
[SUZ-KA25/35VA(H).TH]
Check of defrost heater
M
Replace the inverter P.C. board.
Is there 230V AC between CN722
and
on the
power P.C. board? Refer to 12-6-2.
Yes
No
No problem of the
power P.C. board.
Is the voltage between CN726
(+)-
(-)
on the
power P.C. board 0V DC? Refer to 12-6-2.
Yes
No
Replace the power
P.C. board.
NOTE: In case both thermistors are more than the above
temperature, cool them with cold water etc...
In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5
or less, and let the
defrost thermistor continue to read -1
or less.
3
2
1
230V AC
Check the following points before checking electric continuity.
1) Does the resistance of ambient temperature thermistor have the characteristics? Refer to 12-6-1.
2) Is the resistance of defrost heater normal? Refer to 12-4.
3) Does the heater protector remain conducted (not open)?
4) Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?
26H
CN726
CN722
H
2
1
2
1
2
3
Outdoor base gets frozen.
<SUZ-KA25VAH SUZ-KA35VAH>
Check of LEV (Expansion valve)
L
Start
Replace the inverter P.C. board.
Replace the LEV coil.
Disconnect the connector
CN724 is there normal resistance to LEV coil?
Yes
Turn on power supply to the outdoor unit after checking LEV coil is mounted to
the LEV body securely.
No
Normal
Is "click - click" sound heard?
Or, do you feel vibration of the LEV coil with a hand?
Yes
No
(For wired remote controller use model)
