252
Trouble Shooting Guide
Checking Method for Key Components
• LEV failure check method
* Attention: Outdoor unit LEV and Indoor unit LEV are different in specification,
so the repair process may be different
Failure mode
Diagnosis
Repair process
Unit
Microcomputer
Driving circuit
failure
1.Disconnect the LEV connector form control board and
connect testing LED
2. Main power ON, pulse signal is out from LEV for 17 sec.
If LEDs do not turn on, or are in on state continuously,
then driving circuit is abnormal
Check and replace
Indoor unit control
board
Indoor
unit
LEV locking
1.If LEV is locked, in no load state, the driving motor rotate,
and clicking sound always occurs
Replace LEV
Indoor
/ Outdoor
unit
LEV Motor coil
short or
misconnection
1. Check the resistance between coil terminal
(red-white, red-yellow, red-orange, red-blue)
2. If the estimated resistance value is in 52
±
3
Ω
then the LEV is normal
Replace LEV
Outdoor
unit
1. Check the resistance between coil terminal
(brown-white, brown-yellow, brown-orange, brown-blue)
2. If the estimated resistance value is in 150
±
10
Ω
then the LEV is normal
Replace LEV
Indoor
unit
1. Operate indoor unit with FAN mode and operate another
indoor unit with COOLING mode
2. Check indoor unit(FAN mode) liquid pipe temperature
(from operation monitor of outdoor unit control board)
3. When fan rotate and LEV is fully closed, if there is any
leakage, then the temperature is down
If estimated temperature is very low in comparison with
suction temperature which is displayed at remote
controller then the valve is not fully closed
If the amount of
leakage is much,
Replace LEV
Indoor
unit
Full closing
(valve leakage)
1K
LED
Содержание multi V PLUS
Страница 21: ...Service Manual 21 Indoor Unit Indoor Units ...
Страница 74: ...74 Indoor Unit ...
Страница 86: ...86 Indoor Unit ...
Страница 142: ...142 Indoor Unit ...
Страница 160: ...160 Indoor Unit ...
Страница 179: ...Service Manual 179 Outdoor unit ...
Страница 232: ...232 Outdoor Unit Wiring Diagrams 5 Wiring Diagrams 5 1 50Hz 380V Main Outdoor Unit 5HP 6HP 8HP ...
Страница 235: ...Service Manual 235 Wiring Diagrams 380V AC 60Hz 3Ø 5 4 60Hz 380V Main Outdoor Unit 5HP 6HP 8HP ...
Страница 239: ...Service Manual 239 Wiring Diagrams 5 8 60Hz 220V Main Outdoor Unit 8HP 10HP 12HP ...
Страница 245: ...Service Manual 245 Trouble shooting guide ...
Страница 296: ...296 Trouble Shooting Guide ...
Страница 297: ...Service Manual 297 Appendix ...
Страница 303: ...Service Manual 303 Exploded View Replacement Parts List ...