Troubleshooting For Malfunction Or Abnormalities; Troubleshooting - JRC JLR-7900 Quick Reference

5.3 Troubleshooting for Malfunctions or Abnormalities

5.3.1 Troubleshooting

In the event that smoking or burning odors are detected,
immediately terminate operation of the unit and contact your
sales agent outlet or one of JRC branch offices, sales centers or
liaison offices. Never attempt to check or repair the unit.
Continuing operation may cause a fire or an electric shock.
The following is reference information concerning identification of problems.
Symptom
The power does not
turn on when the
power switch
pressed.
The LCD display does
not display anything.
The display does not
light up.
The alarm sound is
not generated.
The click does not
sound.
There is no reception
(from sensor).
There is no
transmission
(to external devices).
The Dimmer are not
interlocked.
WARNING
Possible Causes
Power is not being supplied by
the ship junction box.
is
Power is not being supplied by
the power supply equipment
(option).
The fuse connected to the power
cable has blown.
The power supply equipment
(option) fuse has blown.
The display unit switch is broken. Consult with JRC or our agents.
The contact is disconnected.
The LCD display is broken.
The buzzer is broken.
The alarm sound is turned off.
The key press sound is turned
off.
The sensor connection cable is
disconnected.
The sensor is broken.
Output settings have not been
configured.
The configured
incorrect.
The DISP-DPU
SUPPLY UNIT is broken.
The baud rate is different.
The dimmer group is different.
The dimmer is different.
The cable is disconnected.
Troubleshooting Measures
Check whether the cabling from the
junction box is normal.
Check whether the power supply unit
cabling is normal (only MID).
If there are no problems in the cabling,
replace the fuse.
If there are no problems in the cabling,
replace the fuse (only MID).
Check the connection (only LOG).
Consult with JRC or our agents.
Consult with JRC or our agents.
Check the alarm sound setting.
Check the click sound setting
Check the connection cable.
Consult with JRC or our agents.
Check the interface setting.
channel is Check the interface setting.
or POWER Consult with JRC or our agents.
Check the RS-485 or Daisy-chain bit
rate. (Daisy-chain is only MID.)
Check the dimmer group number
Check the dimmer unit.
Check the RS-485 or Daisy-chain
connection. (Daisy-chain is only MID.)
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