DIGISYSTEM DSB-500D, Instruction Manual

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DIGISYSTEM LABORATORY INSTRUMENTS INC. www.digisystemlab.com REV.1-2017
Circuit Diagram:
Troubleshooting Guide
Caution:
Always disconnect the power cord before troubleshooting.
Trouble Cause Remedy
Instrument inoperative
Power cord not connected to outlet. Plug instrument in..
Dead power output. Change to different output.
Current is overload, so the no fuse
breaker on the behind of the controller Push the button of the no fuse
breaker to reset
Control head can’t control
the water temperature
Sensor is broken Replacing a sensor
PID controller Replacing a PID controller
Heater is broken Replacing a heater
Pump Circulator doesn’t
work well
Pump Circulator is broken Replacing a Pump Circulator
Foreign bodies blockaged the pump
Circulator
Sweep away the foreign bodies
The key of PID controller
can’t work The keys has been locked Please refer to page 2, Other
functions 5. (c) to release the
lock status.
Temperature is not stable The initial setting value is not suitable
for the ambient air temperature where
the machine is located
Please refer to page 2, Other
functions 4. to set auto-tuning
function to solve this problem.
PV value is not correct User’s calibration thermometer is
different from the factory’s calibration
thermometer Please refer to page 2, Other
functions 3 to adjust PV value