Mitsubishi SUZ-KA35VA Service Manual page 76

Check of LEV (Expansion valve)
L
Start
Turn on power supply to the outdoor unit after checking LEV coil is mounted to
the LEV body securely.
Is "click - click" sound heard?
Or, do you feel vibration of the LEV coil with a hand?
No
Disconnect the connector
CN724 is there normal resistance to LEV coil?
No
Replace the LEV coil.
Outdoor base gets frozen.
Check of defrost heater
M
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?
In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5
defrost thermistor continue to read -1
Is there 230V AC between CN722
power P.C. board? Refer to 12-6-2.
Is the voltage between CN726
power P.C. board 0V DC? Refer to 12-6-2.
Replace the inverter P.C. board.
OC322G
(For wired remote controller use model)
Yes
Normal
Yes
Replace the inverter P.C. board.
<SUZ-KA25VAH SUZ-KA35VAH>
or less.
NOTE: In case both thermistors are more than the above
temperature, cool them with cold water etc...
Yes
and on the
No
Yes
(+)- (-) on the
No
No problem of the
power P.C. board.
Replace the power
P.C. board.
76
[SUZ-KA25/35VA(H).TH]
or less, and let the
2 3
230V AC
CN726
3
2
1
CN722
26H
H