HER Air Heaters
© Munters Europe AB, 2009
Munters reserves the right to make alterations to specifications, quantities, etc. for production or other reasons, subsequent to publication
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4. Maintenance and repair
Warning!
All maintenance operations on the equipment must be carried out by technical service or qualified personnel.
Before any maintenance or service operation, shut off, unplug and let the unit cool. Do not remove guards or service
if the heater is operating, powered or even warm after use. Wear proper personal protection means.
At least every 12 months the equipment must be thoroughly inspected and cleaned, however if the unit is installed in a dusty
or dirty room, this operation must be repeated more often. Also refer to the burner instruction manual.
The mechanical parts of the heater do not need lubrication.
Recommended maintenance operations
General cleaning
Periodically clean the enclosure parts using mild detergents.
Fan/motor assembly
Check the fan/blower. Remove dust, dirt, etc. from fan and air vanes using compressed air.
Burner
An annual check of burner and emissions, preferably before the winter season, by an authorized burner technician is
recommended. Also follow the local and national regulations in force.
5. Troubleshooting
Problem
Cause
Solution
The heater does not start
No power
Incorrect voltage
Too low room thermostat
setting
Thermostat cap/connector not
inserted
Previous safety thermostat trip
Previous burner lock-out
Check power supply system*
Check voltage*
Set higher temperature
Insert thermostat cap/connector
Detect and remove the cause of
overheating then reset
Detect and remove the cause of lock-
out, then reset
The burner starts, the flame does not ignite, the
unit locks out
No fuel
Incorrect fuel
Blocked fuel line
Blocked nozzle
Faulty ignition system
Faulty burner
Fill the tank
Check/replace
Clean filter/hoses/pump*
Clean nozzle
Clean electrode/replace cables*
Check/replace*
The burner starts, the flame ignites, but the
unit locks out immediately later
Dirty or faulty flame sensor
Faulty burner
Incorrect burner settings
Insufficient draught
Dirty or incorrect fuel
Dirty nozzle/incorrect nozzle
size
Clean/replace*
Check/replace*
Check/adjust*
Check installation*
Use correct fuel
Clean/replace
The burner starts but combustion is not good
Dirty or incorrect fuel
Dirty
combustion
chamber/heat exchanger
Dirty nozzle
Incorrect burner settings
Use correct fuel
Clean*
Clean/replace*
Check/adjust*