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7
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6. Troubleshooting
Work precautions
• When servicing, be sure to recreate the malfunction two or three times before starting repairs.
• When servicing, always keep proper footing.
• When servicing, always unplug the power cord from the outlet, or turn off the circuit breaker. Sufficient care
must be taken to avoid electric shock or injury.
• Always connect the power wires properly.
(1) Service Flowchart
After checking the check items below, follow the troubleshooting 1 and 2 for servicing.
Check items
1
Condition of trouble
2
Frequency of trouble:
The date of starting operation
and occurrence of trouble
3
With or without working drawings:
Equipment, wiring
Troubleshooting 1
Lossnay does not operate, or it stops by itself.
Check the initialization checklist from installation to
operation ((2) Table 1).
Troubleshooting 2
Lossnay operates irregularly.
Check the Lossnay checklist ((2) Table 2) and Basic
checklist for the major components ((2) Table 3).
Troubleshooting 1 Lossnay does not operate, or it stops by itself.
(2) Checklist
1
Initialization checklist from installation to operation (Table 1)
No.
Error
Checkpoint
1 The Lossnay operation is
disabled or improper.
Lossnay stops irregularly.
Check the main power connection.
<For VL-100U
5
-E>
• Is the power plug connected to the power supply of rated voltage?
<For VL-100EU
5
-E>
• Is the rated voltage supplied to the terminal block?
• Is there a poor connection?
Troubleshooting 2 Lossnay operates irregularly.
2
Lossnay checklist (Table 2)
No.
Error
Cause
Action
1 The shutter
does not open.
The shutter
does not close.
Is there any foreign matter or obstruction
around the shutter?
Remove it.
2 The fan does
not rotate.
Do the fan blades touch other parts?
Check for an abnormal area.
Replace the parts of the abnormal area.
Is there any foreign matter around the fan? Remove it.
Is there something wrong with the motor? Check the basic checklist for the major
components (Table 3).
3 An unusual
noise comes
from the fan.
Is there any foreign matter around the fan? Check around the fan.
Can you rotate the fan manually?
No: Replace the motor.
Is there an odd feeling when rotating the
fan?
Yes: Replace the motor.
