Barnstead Thermolyne Corporation HP18325 Instrukcja obsługi i lista części - Strona 10
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Drukuj stronęMaintenance and Servicing
Warning
To avoid electrical shock,
disconnect from power supply
before servicing.
Refer servicing to qualified
personnel.
Note
Do not use emery paper or
sandpaper with a course grit to
clean contact points.
Troubleshooting Guide
Problem
Cycle light does not illuminate.
Hot plate does not heat.
Hot plate does not hold
temperature.
10
Preventive Maintenance
Bimetal control contact points may need cleaning
after severe or extended use. To clean the contact
points:
1. Disconnect the hot plate from power
supply.
2. Turn the hot plate upside down and
remove bottom cover.
3. The contact points are accessible now and
may be cleaned with fine sandpaper or a
contact file.
4. If contact points are severely pitted or
burned, replacement is suggested at this
time (refer to the section "Replacing the
control").
5. Replace bottom cover and secure.
6. Turn the hot plate upright and reconnect to
power supply.
Possible Causes
Hot plate not connected to
power supply.
Cycle light burned out.
No power.
Defective electrical hookup.
Burned out heating element.
Burned out heater coil on
control.
Control out of calibration.
Control has failed.
Solutions
Check hot plate connection to
power source.
Replace cycle light.
Check power source and fuse.
Repair electrical hookup.
Replace defective element.
Replace heater coil.
Refer to the section
"Recalibrating control".
Replace control.