Mitsubishi Electric SVZ-KP18NA Service Manual page 28

K Check of LEV (Expansion valve)
Self-check start.
(Refer to "10-2.TROUBLESHOOTING CHECK TABLE".)
Expansion valve operates in full-opening direction.
Do you hear the expansion valve "click,
click·······"?
Do you feel the expansion valve vibrate
on touching it ?
No
Is LEV coil properly fi xed to
the expansion valve?
Yes
Does the resistance of LEV
coil have the characteristics?
(Refer to "10-4. TROUBLE CRITERION
OF MAIN PARTS".)
No
Replace the LEV coil.
Note: After check of LEV, turn OFF the power supply and turn ON it again.
TCH022
OK
Yes
Properly fi x the LEV coil to the expansion valve.
No
Measure each voltage between connector pins
of CN724 on the inverter P.C. board.
1. Pin (-) — Pin (+)
2. Pin (-) — Pin (+)
3. Pin (-) — Pin (+)
Yes
4. Pin (-) — Pin (+)
Is there about 3 ~ 5 VAC between each?
NOTE : Measure the voltage with an analog tester.
Replace the expansion valve.
Note:
Regardless of normal or abnormal condition, a short beep
is emitted once the signal is received.
Yes
28
Replace the inverter P.C.
No board.