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The table below shows the guidelines for detecting failure sections.
Use these countermeasures except for the failures that require repair by JRC or your dealer.
Failure symptom
Power is not supplied
even if the power switch
is turned on.
Not displayed on the
LCD.
The lamp does not light.
An alarm does not
sound.
No click sound is
emitted.
Not received
(from a sensor)
Not received
(from external
equipment)
Not transmitted
(to external equipment)
Section 10 Maintenance and Inspection
Assumed cause/failure
cause
Power is not supplied from
the power board.
Power is not supplied from
the power supply unit
(optional).
The fuse that is connected
to the power supply cable is
blown.
The fuse of the power
supply unit (optional) is
blown.
The switch of the display is
faulty.
The LCD is faulty.
The internal buzzer is
faulty.
The internal buzzer is
faulty.
Sensor connection cable is
broken.
The sensor is faulty.
The polarity of the serial
cable is incorrect.
The interface is incorrect.
The sentence that is input is
not supported.
Output is not set.
The channel that is set is
incorrect.
The control display unit or
connector unit is faulty.
10-4
Countermeasure
Check if the wiring from the power board is
normal.
Check if the wiring from the power supply
unit is normal.
After checking if the wiring is normal,
replace the fuse.
After checking if the wiring is normal,
replace the fuse.
Request repair to JRC or your dealer.
Request repair to JRC or your dealer.
Request repair to JRC or your dealer.
Request repair to JRC or your dealer.
Check the connection cable.
Request repair to JRC or your dealer.
Check if the polarity is correct.
Check if the interface is correct.
Check the input command and version.
See Section 8.7 "Setting communication –
Comms menu" for setting.
See Section 8.7 "Setting communication –
Comms menu" for setting.
Request repair to JRC or your dealer.
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