Gas hot-air heater MONZUN
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instalation, operation instractions and maintenance manual
14
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EN
Notice:
• Shutting down in heating mode with the main switch or
closing the gas supply is prohibited The only permitted shut-
down is electrical, see “Decommissioning“ chapter
• Only the electrical protection of the device, the main switch
or pulling the power cord from the socket can disconnect the
heater from the electrical supply In this way, the device may
only be switched off if it is not in the heating function and the
air fan is not cooling the exchanger
It is important to ensure that the air fan is not obstructed or that the
shutters are closed, as this will change the operating conditions of the
device (too high temperature of the exhaust air due to insufficient cool-
ing of the exchanger) – risk of overheating of the device!!!
Maintenance
Regular annual inspections shall be carried out according to the rel-
evant standard (is not part of warranty service). The manufacturer
recommends to perform a professional service inspection once per
year as described by the manufacturer, in particular:
• Security elements of the appliance.
• Leakage of the heat exchanger, exhaust system and their integrity.
• Leakage of the gas installation of the appliance.
When operating in a polluted environment, it is necessary to regular-
ly remove dust that may accumulate on the louvres, the air fan grill
and around the heat exchanger.
All professional work may only be performed by a service technician
with the relevant certificate and authorization from the company
MANDÍK, a. s.
Failures and their elimination
Before solving a MONZUN heater fault, we recommend:
Make sure the gas caps are open. Check the power cables and control
presents. Most commissioning failures result from poor cable instal-
lation, which can lead to damage to the controller.
• 230 V between phase L1 and neutral conductor N
• 230 V between phase L1 and a protective conductor PE
• 0 V neutral conductor N and a protective conductor PE
Make sure that the room thermostat is set to heating.
After each repair or conversion, the heater must be put back into operation by a service technician trained and authorized by the
company MANDÍK, a s
Heater failure
Cause
Removal
The power light (green light)
is off
faulty light
replace the light
fuses (circuit breakers) dropped
replace fuses (switch circuit breaker)
grid failure
remove the fault of the grid
The burner fan does not work
faulty burner fan
replace the burner fan
defective automatic control
replace the control automatic
faulty burner thermostat
replace the burner thermostat
defective emergency thermostat
replace the emergency thermostat
faulty thermal protection of the air fan
replace the air fan
defect in wiring
check the electrical connection
Can’t start – burner fan works
defective gas valve
replace the gas valve
defective control automatic
replace control automatic
electrodes or electrode cables not assembled or defective
replace or set correctly
wrong electrode grounding
ground properly
poorly set starting power
properly set start power
low gas pressure in the distribution
increase the pressure in the distribution
The burner starts, but then
goes off
defective ionisation electrode
replace ionisation electrode
defective ionisation electrode cable
replace cable
The burner goes off and then
red light indicator (overheating)
lights up
overheated exchanger
unlock thermostat
defective emergency thermostat
replace the emergency thermostat
Air axial fan does not start
defective air fan
replace the air fan
faulty capacitor of the fan
replace the capacitor
defective fan thermostat
replace the fan thermostat
Tab 9:
Failure and fixing
