Kikusui PLZ164W User Manual page 177

Symptom 4: Input current is unstable or oscillates.
Check Item
Location and Status of the Object
Is rated voltage applied for the
input power supply (AC)?
Is the ALARM illuminated?
Is there a large loop in the load
wire?
The load wire is long.
Symptom 5: ALARM is activated.
Check Item
Location and Status of the Object
Is the fan stopped?
Is the air intake or outlet
obstructed?
Is OCP tripped?
Is OPP tripped?
Symptom 6: The load cannot be turned on.
Check Item
Location and Status of the Object
A sequence is in operation
PLZ-4W
Possible Cause
Check Result
No Low supply voltage
Yes Malfunction
An internal or external
Yes
error occurred on the
PLZ-4W.
Yes
Long
Possible Cause
Check Result
Overheat protection
Yes
tripped.
Overheat protection
Yes tripped.
Clogged dust filter
Yes
The OCP setting is small.
Yes The OPP setting is small.
Possible Cause
Check Result
Yes
The load on/off logic
No (Load ON IN) is set to
low.
Use the PLZ-4W in the input
supply voltage range.
Immediately stop the use of the
instrument and request repairs.
Check the alarm type and carry
out the appropriate remedy.
See section 5.3, "Types of Pro-
tection Functions."
Twist the wires.

See section 2.8, "Load Wiring."
Change the response (transient

response) using menu setup.
Immediately stop the use of the
instrument and request repairs.
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.
Set an appropriate OCP value on
the setup screen.
See section 5.4, "Setting the Pro-
tection Function."
Set an appropriate OPP value on
the setup screen.
See section 5.4, "Setting the Pro-
tection Function."
Wait for the sequence operation
to finish.

Abort the sequence using the
STOP key.
Set Load ON IN to high using
menu setup.
See section 5.13, "Menu Setup."
Maintenance and Calibration 8-15
Remedy
Remedy
Remedy