106
PLZ-4WL
Troubleshooting
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Symptom 5:ALARM is activated.
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Symptom 6:The load cannot be turned on.
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Symptom 7:Even after the load is turned on, current does not flow or the
voltage indication is negative.
Check Item
Possible Cause
Remedy
Location and Status of the Object Check Result
Is the fan stopped?
Yes
Overheat protection tripped.
Immediately stop the use of the instrument
and request repairs.
Is the air intake or outlet
obstructed?
Yes
Overheat protection tripped.
Clogged dust filter
Allow at least 20 cm between the air outlet
and the wall. In addition, do not place
objects within 20 cm.
Clean the dust filter.
Is OCP tripped?
Yes
The OCP setting is small.
Reset the OCP value in the setup screen.
See: "Protection Functions" on page 49
Is OPP tripped?
Yes
The OPP setting is small.
Reset the OPP value in the setup screen.
See: "Protection Functions" on page 49
Check Item
Possible Cause
Remedy
Location and Status of the Object Check Result
A sequence is in operation
Yes
Wait for the sequence operation to finish.
Abort the sequence by pressing STOP.
No
The load on/off logic (Load ON
IN) is set to low.
In the menu, select “Configuration” and set
“Load ON INput” to “HIGH.”
See: "Menu" on page 54
Are you using an external
signal to turn the load off?
Yes
The load key will be valid after you use an
external signal to turn the load on.
See: "Turning the Load On and Off
through External Control" on page 89
Check Item
Possible Cause
Remedy
Location and Status of the Object Check Result
Are the sensing wires
connected in reverse?
Yes
Connect the wires properly.
See: "Remote Sensing" on page 24