Check Method In The Case Of The Failure Display In The Remote Controller - Mitsubishi Heavy Industries FDTVA402HEN1R Technical Manual

(5) Check method in the case of the failure display in the wired remote controller
(a) Louver motor does not operate
Inspect at the indoor unit side.
Operate more than
1 min. later
Defective indoor unit
PCB
(b) 4 way valve does not switch during heating operation
Defective outdoor unit PCB
Does the
NO
louver operate at
power on?
YES
Is the
louver operated YES
with the remote
controller
NO
Note (1) LM; Louver motor
Replacement
Is the
voltage between
YES
connector CnS 1 and
2 AC 220/240V or
380/450V?
NO
Replacement
Is LM wire NO
broken?
YES
Repair the wire
Normal
Defective 20S
Replacement
194
- -
Is LM wire NO
Defective indoor
locked?
YES
Replace LM
unit PCB