Chapter 5 Troubleshooting - Panasonic SQ4-C11 Instruction Manual

Chapter 5 Troubleshooting

Symptom
All indicators are OFF
Test input indicator
(orange) lights.
Interlock indicator (yellow)
lights.
Display Symptom
Incorrect number of
sensors
Sensor error
Safety input 1 / 2
circuit error
Control outputs 1
, / 2 (OSSD 1 / 2)
output circuit error
MJE-SQ4C11 No. 0095-80V
Cause
Power is not supplied.
The power voltage is out of the
Connectors are not securely
connected.
Test input is opened
Wiring to reset is
not performed.
Resetting is not
Relay is fused.
cancelled.
Relay response
time is long.
The start-up re-
set signal is not
input. (Manual)
Cause
The number of sensors con-
nected does not conform to the
value of the sensor number set-
ting switch.
Or the number is not matched
due to failure of sensors.
The sensors connected do not
operate correctly.
Safety input terminals SIN1 and
SIN2 are shorted.
Control output terminal Y1 or Y2
is shorted with 0V or +V.
Shorting between control output
terminals Y1 and Y2 or with
other input / output lines is
found.
Overcurrent runs in control out-
put terminal Y1 or Y2.
The settings of the control output
polarity selection switch do not
conform to combinations of con-
trol output terminals Y1 and Y2
wires.
Output circuit error
Troubleshooting
Remedy
Connect the power supply correctly.
Set the power voltage correctly.
Connect connectors securely.
Short-circuit the test input terminals between T1
and T2.
X3) correctly.
To ensure the system safety, use the NC contact
of the forced guide relay.
Replace the relay.
Replace the relay with the one of appropriate
response time.
Use the momentary switch.
Replace the switch.
Remedy
Match the setting of this device with the
number of sensors connected.
Set the sensor connection number setting
switch correctly.
Replace the failed sensors.
Be sure sensor is ON
Turn ON power supply again and the status is
not changed. Replace the sensor
Sensor monitoring output indicator con-
nected to broken sensor and indicator of
the failed sensor brink.
Check wires of safety input terminals SIN1
and SIN2.
Check if safety contacts or safety sensors are
broken, and replace them as necessary.
Wire control output terminals Y1 and Y2
correctly.
2-4 Wiring."
range of control output terminals Y1 and Y2.
Set the control output polarity selection switch
correctly.
Parts."
Wire control output terminals Y1 and Y2
2-4 Wiring."
Output circuit is damaged.
Replace this device.
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. "
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