Led Indications On The Circuit Board; Individual Function Check Items - Mitsubishi Electric LGH-F300RVX-E Handbook

[5] LED Indications on the circuit board

No. LED Contents
1 LED1 Lossnay main
(Green) unit error indi-
cator
2 LED2 M-NET System
(Red) error indicator
3 LED3 Remote control-
(Green) ler power supply
indicator
4 LED4 Power supply
(Red) indicator (control
circuit board)
5 LED6 Power supply
(Red) indicator (power
circuit board)

Individual function check items

[6] If Lossnay does not work in the trial operation after installation is completed, or if Lossnay stops working
during use, check the following items.
No. Problem
1 The fan does not
operate even
though the trial
operation switch
(SW2-1) on the cir-
cuit board is turned
ON.
Check Item
Blinking: Starting up, error occurred See Failure Mode 4.
Lit: During delay operation
Unlit: Other than above
Blinking: Error occurred
Lit: No M-NET connection informa-
tion
Unlit: Other than above
Lit: Power supplied to the remote
controller (Main Lossnay)
Unlit: Power not supplied to the
remote controller (Sub Lossnay)
Check that this LED is lit
Check that this LED is lit
Factor
The connectors between the
fan motor and circuit board is
disconnected.
The connector between the
control circuit board and
power circuit board is dis-
connected.
The model selection switch
(SW6) is not set correctly.
The temperature around the
product is high.
Fan motor failure
Circuit board failure
Lossnay operates after the delay time
has passed.
It is normal.
See Failure Mode 4.
When using M-NET, perform group reg-
istration with the system controller.
It is normal.
The LED goes out when power is sup-
plied to the remote controller from other
Lossnay units in a multiple Lossnay
group.
The LED lights while power is being
supplied to the control circuit board.
The LED lights while power is being
supplied to the power circuit board.
(Do not touch components on the circuit
board when the LED is lit.)
Check the connector (CN9) for the exhaust fan motor
and the connector (CN10) for the supply fan motor.
Check the connector connections (CN18-CN118 and
CN19-CN119).
Check the connector connection (CN21-CN121).
(For LGH-F1200RVX-E only)
Make the SW6 setting appropriate for the model.
(See chapter 8. (8) Setting status record (page 48).)
Use the product at a temperature of 104°F (40°C) or
lower.
Check the resistance between the motor leads.
(See (6) Motor resistance table (page 36).)
If the measured value is significantly different from
the values specified in the table, replace the fan
motor.
Disconnect the connectors (CN9 and CN10), and
check the output voltage of each pin of the connec-
tors within one minute after turning the switch (SW2-
1) ON. (One minute later, the error will occur.)
(See chapter 6. (2) Power circuit board (page 11).)
If the voltage value is abnormal, replace the circuit
board.
If the problem persists, replace the fan motor.
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Corrective action
Corrective action