17
Fault
Cause
Remedy
Burner does not start
No voltage present
Check fuse, electrical connections, position of ctrl.unit,
or enters fault state
ON/OFF switch and heat. system emerg. stop switch
Oil tank empty /
Fill oil tank /
Gas supply line shut off
Open gas supply line
Burner fault
Press the reset button at the boiler control unit
(see burner installation instructions)
High limit safety cut-out
Press the reset button on the control unit.
has switched OFF
Oil filter clogged
Replace oil filter
Heating circuit
System in summer mode
Check summer/winter switch position
pump does not start
Heating circuit pump locked up
Turn the pump shaft with a screwdriver
Heating circuit pump faulty
Replace the heating circuit pump
Cylinder loading pump
DHW cylinder thermostat faulty
Check the DHW cyl. thermostat and replace, if nec.
does not run
DHW loading pump locked up
Turn the pump shaft with a screwdriver
Cylinder loading pump faulty
Replace the DHW loading pump
The heating system operates,
Maximum boiler temperature
Raise maximum boiler temperature.
but room temp. too low
set too low
Troubleshooting
Содержание MKS 140
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