12
Safety thermostat in electrical heater
(optional equipment)
If an error occurs on an electrical heater, the safety
thermostat will disconnect.
The heater is equipped with a fire thermostat that
automatically cuts off the power supply, if the
temperature exceeds 50 °C. If the temperature decreases,
the heater automatically re-engages.
As an additional security there is a built-in thermal cut-
out, which disengages if the temperature exceeds 100 °C.
Re-engaging must be done manually.
Does not apply to PTC electrical heaters.
The system is not running
Unit stopped
Possible error
• Fuse in main board has blown, no power to unit.
• One of the fuses on the circuit board of the unit isblown.
• Loose wire, no power to unit.
• Loose wire between unit and control panel.
• Faulty or incorrectly set week program.
• Filter timer has switched the system off.
Condensed water is leaking from the unit
Possible error
• Condensation outlet blocked by dirt.
• The condensation outlet is not adequately protected
against freezing at low outdoor temperatures.
Air faults
No supply air
Possible error
• Faulty supply air fan
• Clogged supply air fi lter
• Clogged fresh air grill due to dirt and leaves during the
fall and snow and ice during the winter.
• Fuse on the circuit board is blown.
• The unit is in defrost mode (supply air fan stops)
• Incorrect value set in User menu item 2.
No extract air
Possible error
• Faulty extract air fan
• Clogged extract air fi lter.
• Fuse on the circuit board is blown
Cold supply air
Possible error
• Clogged heat changer.
• Faulty extract air fan.
• Clogged extract air filter.
• Electrical reheater is disconnected at the over heating
thermostat (only units with electrical reheater installed).
• Air in the heating pipes, faulty thermostat / motorvalve,
incorrect setting of control panel.
Within the guarantee period (0-2 years)
The installer from whom you have bought the system.
After the guarantee period (2 years ->)
The installer from whom you have bought the system or
the Genvex service department (+45 7353 2765).
Before calling, please write down the data from the
inscription plate (silver plate on the unit).
Alarms
Filter timer
The control has a filter timer to guarantee that the filter is
changed and that optimal operation is established. When
the timer reaches the set value, “Chg. filter” will flash in
the display until the filters have been changed.
When the filters have been changed, the button for the
filter symbol must be held down until ”Alarm!”, “Chg. Filter”
and the exclamation mark disappears and the unit reverts
to normal operation.
Com error
This error appears when there is no communication
between the display and control. Check that the wiring is
correct on terminals 21 to 24.
21
Signal
22
Signal
23
10 Volt
24
0 Volt
Frost protection error
This error message will be displayed if a water reheater
is fitted to the system and the temperature of the water
reheater is too low, causing a danger of frost burst.
The control will stop the system and open the motor-
operated valve to keep the heater warm.
TROUBLESHOOTING
