Mitsubishi Electric LGH-50RSDC-E1 Handbook page 19

LED 1 LED 11 LED 2 LED 3
(red) (green) (red) (green)
4
- - -
blinks
5
- - -
blinks
8
- - -
blinks
In case multiple errors have occurred at the same time, each LED will blink simultaneously.
When reconnecting the power supply, wait more than 5 minutes after power-off, and then turn it on again.
LED displays (Normal)
LED 1 LED 11 LED 2 LED 3
(red) (green) (red) (green)
Lit
- - -
2
Lit
- - -
2
- - Lit -
- - - Lit
2 When one of LED 1 and LED 11 is blinking (during an error), the other one will be unlit.
All LEDs are temporarily lit just after power-on.
Symptom
OA thermistor Connector connection
failure error of thermistor
Thermistor malfunc-
tion
RA thermistor Connector connection
failure error of thermistor
Thermistor malfunc-
tion
External de- The following condi-
vice error tions developed.
(when the • OA temperature is
switch SW 1-2 still -10°C or lower,
is ON) 60 minutes after
the TM4 8,9 output
started.
• OA temperature is
15°C or higher within
15 minutes after
the TM4 8,9 output
started.
Contents
Power supplying to the circuit board
Trial operation
SA fan operation
EA fan operation
Cause
Check the wiring of the connector (CN16) on
the circuit board and the thermistor.
Check the resistance of the thermistor.
If it has a defect, replace the thermistor.
Check the wiring of the connector (CN16) on
the circuit board and the thermistor.
Check the resistance of the thermistor.
If it has a defect, replace the thermistor.
When external devices are connected,
check the external devices.
When external devices are not connected,
check the switch SW 1-2.
Lit when the power is supplying to the circuit
board.
Lit during trial operation (SW 1-1 ON).
Lit during the SA fan operation.
Lit during the EA fan operation.
─ 19 ─
Corrective action
Descriptions