Mitsubishi Electric LOSSNAY VL-5050SR2-E Handbook page 15

(3) Lossnay checklist
Troubleshooting 2 Lossnay operates abnormally.
No. Error
1 The shutters
do not open or
close.
2 The fans do not
rotate.
3 The fans do not
stop.
4 Operating mode
(fan speed) can-
not be switched.
5 An unusual
noise comes
from the fans.
6 The operation
lamp does not
illuminate.
Cause
Is there any foreign matter or obstruction
around the shutters?
Are the shutters detached from guide rails
of the casing?
Are the following connectors on the main
circuit board securely connected ?
VL-50S -E, VL-50ES
2 2
VL-50SR -E: CN2, CN3, CN4
2
Do the fan blades touch other compo-
nents?
Is there any foreign matter around the fans? Remove it.
Are there any problems with the motor?
Is the voltage 220/230/240 V AC output
from the main circuit board?
<VL-50S -E>
2
Do the fans continue operating even if the
switch with a pull cord is turned OFF?
<VL-50S -E>
2
Is the switch with a pull cord caught on
some components?
<VL-50S -E>
2
Does the switch with a pull cord work
properly?
Are there any problems with the main
circuit board or display circuit board?
Is there any foreign matter around the fans? Remove it.
Are there any odd feelings when rotating
the fan?
Does the motor generate abnormal
noise?
Are the Lossnay core and filters properly
installed? (Check the installation direc-
tions and positions.)
Is the LED on the display circuit board
tilted?
Is the following connector on the display
circuit board securely connected?
VL-50S -E, VL-50ES
2 2
VL-50SR -E: CN201
2
Are there any problems with the main
circuit board or display circuit board?
Remove it.
Attach the shutters properly.
Connect the connectors securely.
-E: CN3, CN4, CN5
Check for any abnormal area.
Replace any abnormal or defective parts.
Diagnose the problems of the motor by
checking the Basic checklist for the major
components (Table 1). (See page 16.)
Disconnect the following motor connector to
check the output voltage.
VL-50S
VL-50SR
(See page 16.)
If the fans do not stop operating, replace the
switch.
Eliminate the cause of catching.
Operate the switch to check whether it ob-
tains click feeling.
lems, replace the switch.
Diagnose the problems of the circuit boards
by checking the Basic checklist for the major
components (Table 1). (See page 16.)
If there are any odd feelings, replace the
motor.
Diagnose the problems of the motor by
checking the Basic checklist for the major
components (Table 1). (See page 16.)
Install the Lossnay core and filters properly.
Attach the LED case cover so that the LED is
positioned in the hole of the LED case cover.
Connect the connector securely.
-E: CN1
Diagnose the problems of the circuit boards
by checking the Basic checklist for the major
components (Table 1). (See page 16.)
─ 15 ─
Action
-E, VL-50ES -E: CN3
2 2
-E: CN2
2
If there are any prob-