Check Details; Lossnay Does Not Work; Initial Check Items - Mitsubishi Electric LGH-F300RVX-E Handbook

Lossnay does not work after installation is
completed.
Lossnay does not work in trial operation
after installation is completed, or Lossnay
stops working during use.
The remote controller does not work after
installation is completed.
Operations such as ON/OFF, fan speed or
ventilation mode switching are not possi-
ble on the remote controller after installa-
tion is completed.
• An error code is displayed on the remote
controller.
• LEDs on the circuit board blink or light.

7-2 Check details

(1) Failure mode 1: Lossnay does not work.

Initial Check Items

Check the following details if Lossnay does not work after installation is completed.
[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)?
208-230 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, TAB2, and TAB5)?
7 Is there a faulty connection on the reactor terminals
(TAB3 and TAB4)?
For LGH-F1200RVX-E, check both the power circuit
board and power circuit board (upper).
8 Are the power supply indicator lamps (LED4 and LED6,
red) lit?
For LGH-F1200RVX-E, check both the power circuit
board and power circuit board (upper).
Check Item
─ 13 ─
(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 designated power supply.
Connect the cable securely and correctly, and
tighten the screws firmly.
Connect the lead wires securely.
Connect the lead wires securely.
Check the above items.