Table of Contents
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Electrical Problems
No power
Repetitive tripping of circuit breaker
No operation with power on
Thermo Scientific
Troubleshooting
Section 7
Cause
Unsuitable power supply
Power cut-off by a circuit
breaker or power blackout
Loose power connection
Damages in power cords,
power outlets, or plugs,
Internal circuit failure
electrical overload
Internal circuit failure
Power cut-off by built-in
overheat prevention circuit
Internal circuit failure
Corrective Action
Meet the electrical requirements of this instrument before use.
Find out why blackout or cut-ff happened and restore power. If
there is a short circuit or leakage, trace the source of the prob-
lem and fix it.
Reconnect the power cord firmly to the power outlet as well as
to the power socket at the back of the instrument
Replace the damaged part with a proper one.
Contact Thermo Scientific for service.
Disconnect all the appliances connected to the breaker first and
reconnect them one by one to find the reason for the overload.
Contact Thermo Scientific for service.
If the main body is overheated, the built-in overheat prevention
circuit stops heating to protect the instrument.
In such cases, let the instrument cool down for some time
before power reconnection.
Contact Thermo Scientific for service.
Hotplate & Magenetic Stirrer
7-1
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