Mitsubishi Electric Lossnay LGH-15RVX-ER Installation Instructions Manual page 23

Trial operation (continued)
4. If trouble occurs during trial operation
Symptom
operation switch for the remote
Does not operate even when
the operation switch for remote
Indoor unit or external device does
not interlock.
with the remote controller.
Eng-22
and any other transmission cables.
capacity
and other transmission cables.
-->
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In the case of voltage charged 12 or 24 VDC output device: Connect to external control input terminals
1 and 2.
In the case of uncharged a-contact output device: Connect to external control input terminals 1 and 3.
Check if the transmission cable from the external device has come off of the external control input terminal.
Charged 12 or 24 VDC output device
Uncharged a-contact output device
Mr. Slim
Fault on supply fan motor
Fault on exhaust fan motor
Fault on OA thermistor
Fault on Pre-heater capacity or relay of TM370
Fault on remote controller communication
Fault on function setting
Fault on power supply to remote controller
Error in M-NET communication
Inspect the transmission cable
Check the power supply
Operation signal
12 or 24 VDC
R
Turn off the power and immediately contact your
dealer.
1 and 2.
Stop signal
0 VDC
Unlimited resistance
Turn the power off and consult
R
your dealer.