Munters MIR 37 WU, Инструкции по эксплуатации, установке и обслуживанию, Страница: 7 / 10

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5.3. Shut down.
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Set switch to “OFF” to shut the flame off. The fan will go on rotating for 1 min 45 sec to cool the heater
down. The fan motor will automatically stop at the end of the aftercooling time, then the unit can be
disconnected from mains.
Never disconnect the supply plug to stop the heater while in operation
The big amount of heat produced could damage the components: allow cooling sequence to take place
6. MAINTENANCE
•
Before carrying out any maintenance operation, disconnect the power plug.
•
Maintenance must be carried out by qualified personnel (see also par. 7)
•
The appliance must be thoroughly cleaned once a year to ensure good combustion and long life.
•
Clean periodically
the oil spraying nozzle and its filter;
the oil pump filter
the main fuel filter cartridge
the ignition electrodes
the fan blades
the inside of the appliance, using compressed air
the flame sensor with a mild detergent
•
Periodically check cables and electrical connections.
•
Check the oil filter and replace if necessary.
7. TROUBLESHOOTING
TROUBLE CAUSE SOLUTION
Heater does not start No power
Check main distribution board and
power supply line
Faulty cable/connections Check/have cable replaced by a
qualified electrician
Burnt fuse
Room thermostat set too low Check and replace if required
Set room thermostat on a higher
temperature
Room thermostat socket cap not
inserted
Insert cap into the thermostat socket
Heater in lock-out mode Reset
Dirty or faulty flame sensor Clean or replace Heater starts, flame ignites but then
heater locks out
Faulty burner control unit
Contact service personnel
Clogged nozzle Clean or replace
Flame sensor receives an external light
signal during ignition sequence Check for external lights (sun, lamps,
etc.)
Heater starts, flame does not ignite and
then heater locks out
Faulty burner control unit Contact service personnel
No fuel Fill tank
Ignition fault, dirty or incorrectly spaced
electrodes Clean electrodes, contact service
personnel if required
Dirty or blocked nozzle Clean or replace
Clogged filters Clean or replace
Heater starts, but combustion is not
good
Leakes in fuel circuit Check and eventually replace
Oil pump provides low pressure Contact service personnel
Insufficient combustion air Wrong air lock setting
Insufficient ventilation air Contact service personnel
Heater stops as the air pressure switch
functions The appliance has overheated
Faulty pressure switch See par. 5.2.
Contact service personnel