Follett FHS L900 Operation And Maintenance Manual - Page 8
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8. TROUBLESHOOTING GUIDE
Before calling for service
1.
Check that unit is plugged in.
2.
Test outlet with another mobile device to verify power.
Symptom
Unit doesn't operate.
(no heating, controller doesn't
show any digits, on/off switch
doesn't light if on)
Bottom heating:
Digital controller works,
but no heating observed
Digital controller shows
A21 or A22 error
Upper heating:
No heating
Temperature to low
No light
Follett Europe Polska Sp.z.o.o., www.follettice.com, tel/fax : 0048 58 78 56 140/159
Possible causes
• on/off switch faulty or in
OFF position (red light on
the switch doesn't work);
loose connection.
• Unit not plugged in
• No power supply in network
• Heating mattes or connections
malfunction
• Probe issue. "OPE" if the probe
circuit is opened, or "SHr" if
there is a short in the circuit
• Rod heater or its connection
malfunction.
• Analog thermostat in hatco
module.
• Bulb worn out, or bulb housing
and connectors malfunction
Solution
• Turn on/off switch to ON
position(red light should
work); check switch and
connections.
• Connect the plug.
• Check the fuses in Main
Distribution Board.
• Check the circuit continuity, call
Follett service for help
• Check the probe circuit
continuity, call Follett service for
help, install new probe
• Check the circuit continuity, call
Follett service for help
• Check the temperature setting on
analog thermostat
• Change the 25W e14 Bulb, if
didn't help, check the bulb
housing and connectors.
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