Venkon XL UL
Assembly, installation and operating instructions
50
10.1 Fault table
Fault
Possible cause
Remedy
No function.
No power supply.
Check voltage, switch on repair switch.
Replace fuse.
System water leakage
Heat exchanger defect.
Replace heat exchanger if necessary.
Hydraulic connection not correct.
Check flow and return, retighten if necessary.
Water leakage condensate
Drains of the condensate tray clogged.
Clean condensate drains and check for sufficient
slope.
Cold water pipe not properly insulated.
Check insulation.
Condensate drain not properly installed.
Check the function of the condensate pump.
Check condensate drain, clean if necessary.
Air-conducting accessory components not prop-
erly insulated.
Check insulation.
Water leakage condensate
In humid cooling mode, no manufacturer-com-
pliant M5 / MERV 8 or F7 / MERV 13 filter is
used.
Use manufacturer-compliant filter.
Unit not heating or cooling sufficiently (LPHW/
CHW)
Fan is not switched on.
Switch on fan at controller.
Air volume is too low.
Set a higher speed.
Filter is dirty.
Replace filter.
No heating or cooling medium.
Switch on heating and/or cooling system, switch
on circulation pump, vent unit/system.
Valves not operating.
Replace faulty valves.
Water volume too low.
Check pump output, check hydraulics.
Setpoint temperature on the controller set too
low/high.
Adjust temperature setting on the controller.
Operating unit with integral sensor and/or ex-
ternal sensor is exposed to direct sunlight or po-
sitioned over a heat source.
Place operating unit with integral sensor and/or
external sensor in a suitable position.
Air cannot blow out or in freely.
Remove obstacles at the air outlet/air inlet.
Heat exchanger dirty.
Clean heat exchanger.
Air in the heat exchanger.
Vent heat exchanger.
Unit too loud
Speed too high.
Set a lower speed, if possible.
Air inlet/outlet opening is obstructed.
Free air ducts.
Filter dirty.
Replace filter.
Rotating parts unbalanced
Clean and/or replace impeller. Please make sure
that no balancing clips are removed during
cleaning.
Fan dirty.
Clean dirt from fan.
Heat exchanger dirty.
Clean dirt from Heat exchanger.
10.2 Start-up after rectification of fault
After correction of the fault, carry out the following steps for recommissioning:
1. Make sure that all maintenance covers and access openings are sealed.
2. Switch off the unit.
3. Acknowledge the fault on the controller, if necessary.
Содержание Venkon XL UL
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