Mitsubishi Electric Mr. Slim PLA Series Service Manual page 26

9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA
Phenomena
(1)Upward/downward vane
performance failure
(2)Receiver for IR wireless remote
controller
OCH581
Cause
1
2
3
1
2
3
4
Countermeasure
1
2 2
3
1
2–4