RoboLabs RC800MD Instruction Manual page 31

Trouble
Machine doesn't turn off after
pressed.
Warning message «ВНИМАНИЕ!
ПРОВЕРЬТЕ ПОДКЛЮЧЕНИЕ К СЕТИ»
on the screen.
Machine doesn't heat up, or heats up
slowly.
Possible reason
Open circuit.
Relay K1 fault.
Open circuit.
Wrong phase sequence.
EK1-EK6 heaters fault.
VS1, VS2 solid-state relays fault. Check solid-state relays.
KM1 contactor fault.
Wrong settings of DC3 thermal
cut-out.
DC3 thermal cut-out fault.
Remedy
Check continuity between:
cord plug
•
• QF circuit breaker
KM2 contactor
•
SB button
•
• PSU power supply unit
K1, K2 relays
•
Restore connection, face up pitted
contacts, tighten loosen contacts.
Check relay operation.
Replace fault component.
Check continuity between:
DC1 controller
•
• K1 relay
Restore connection, face up pitted
contacts, tighten loosen contacts.
Swap any two phase wires in the
cord plug.
Check the heaters.
Replace fault component.
Replace fault component.
When installing new relay, apply
thermal paste between relay and
heat sink.
In case of solid-state relay fault,
clean MF fan impeller, check fan
operation.
Tighten loosen screws (that fix the
relays to heat sinks).
Check air filter.
Replace fault component.
Check operation of the contactor.
Replace fault component.
Set up the thermal cut-out.
Check thermal cut-out operation.
With AL1 indicator on, there should
be mains voltage on terminal 7 of
the thermal cut-out.
Replace fault component.
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