Check Details - Mitsubishi Electric Lossnay LGH-50RVS-E Handbook

Lossnay does not start properly.
Lossnay does not work in trial operation,
or Lossnay stops working during use.
The remote controller does not work.
Operations such as ON/OFF, fan speed
or ventilation mode switching are not pos-
sible on the remote controller.
• An error code is displayed on the remote
controller.
• LEDs on the circuit board blink or light.

6-2 Check Details

(1) Failure mode 1: Lossnay does not work.
Initial Check Items
Check the following details if Lossnay does not work.
[1] Power supply
No.
1 Is the main power supply on?
2 Is the current capacity of the power supply isolator
appropriate?
3 Is the designated cable used for the power supply
cable?
4 Is the specified power supply supplied to the power
supply terminal (TM1)?
220-240 V/50 Hz, 220 V/60 Hz
5 Is the power supply cable incorrectly wired, is there a
faulty connection or are screws loose?
6 Is there a faulty connection on the power supply termi-
nals (TM1, TAB1, and TAB2)?
7 Is there a faulty connection to the reactor?
8 Are the power supply indicator lamps (LED4 on the con-
trol circuit board and LED6 on the power circuit board,
red) lit?
Check Item
─ 11 ─
(1) Failure mode 1: Lossnay does not work.
(2) Failure mode 2: The remote controller does not
work.
(3) Failure mode 3: Operations on the remote con-
troller are not possible.
(4) Failure mode 4: Error code and LED display
Corrective action
Turn the main power supply on.
Use an appropriate power supply isolator.
Use the designated cable.
Supply the specified power supply.
Connect the cable securely and correctly, and
tighten the screws firmly.
Connect the lead wires securely.
Connect the lead wires securely.
The LED lights while power is supplied.
If not lit, check the above items.