7-6 Maintenance PLZ-U
The PLZ-U does not operate according to the settings.
The current does not
flow immediately
when the load is
turned on.
Is delayed load-on specified?
Shorten the delayed load-
on time.
Section 5.9, “Configu-
ration Settings”
Unable to turn on the
load from the FRAME
CONT connector.
Is FRAME CONT connector 1
ENABLE set to disable (high
level)?
Set FRAME CONT con-
nector 1 ENABLE to
enable (low level).
Section 5.10.1,
“FRAME CONT Con-
nector”
Unable to turn on the
load from the CH
CONT connector.
Is the polarity of the load-on exter-
nal control correct?
Match the polarities
between the load-on exter-
nal control in the configura-
tion settings (CONFIG
number 7) and LOAD ON
of the CH CONT connec-
tor.
Section 5.9, “Configu-
ration Settings”
Symptom Check Items Remedy Reference
The current is unstable.
Is there a large loop in the load
wire?
Shorten and twist the load
wire.
Section 2.7.1, “Precau-
tions Concerning Wir-
ing”
Is an alarm occurring?
• Check the alarm type and
eliminate the cause of the
alarm.
• Eliminate the cause, and
then clear the alarm.
Section 4.4, “Protec-
tion Functions and
Alarms”
The setting current is
not flowing.
Is the LED located inside of the
load unit illuminated?.
Fuse blow.
Immediately stop the use of
the instruments and request
for repair service.
Section 7.2, “Confirm-
ing status of the fuse”
The current does not
change even when the
rotary knob is turned.
Are the keys locked (KEY LOCK
LED illuminated)?
Release the key lock.
Hold down the KEY LOCK
(SHIFT + LOCAL) key
until the KEY LOCK LED
turns off.
Section 5.8, “Key Lock
Function”
Is the EXT LED of the load unit
illuminated?
Set CONFIG number 2 in
the configuration settings to
0 (no external control).
Section 5.10.2, “CH
CONT Connector” and
section 5.9, “Configu-
ration Settings”
Is the RMT LED of the frame illu-
minated?
Press the LOCAL key to
release remote control.
EXT/RMT/KEY
LOCK indicator [17] in
section 3.1.1, “Frame”
Is the ENTRY key of the channel
whose settings you wish to change
illuminated?
Press the ENTRY key of
the channel whose settings
you wish to change to
select the channel.
Section 4.1, “Panel
Control Basics”
Symptom Check Items Remedy Reference