Service Manual

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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.
7-2 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. Check Item Corrective action
1 Is the main power supply on? Turn the main power supply on.
2 Is the current capacity of the power supply isolator
appropriate?
Use an appropriate power supply isolator.
3 Is the designated cable used for the power supply
cable?
Use the designated cable.
4 Is the specified power supply supplied to the power
supply terminal (TM1)?
208–230 V/60 Hz
Supply the specified power supply.
5 Is the power supply cable incorrectly wired, is there a
faulty connection or are screws loose?
Connect the cable securely and correctly, and
tighten the screws firmly.
6 Is there a faulty connection on the power supply termi-
nals (TM1, TAB1, and TAB2)?
Connect the lead wires securely.
7 Is there a faulty connection to the reactor? Connect the lead wires securely.
8 Are the power supply indicator lamps (LED4 on the con-
trol circuit board and LED6 on the power circuit board,
red) lit?
The LED lights while power is supplied.
If not lit, check the above items.
(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