TOPVEX SF OPERATING MAINTENANCE 130323A002

Troubleshooting |

6 Troubleshooting

Should problems occur, please check or correct the following before contacting your service representative.

Always check if there are any alarms active in the control panel.

1. The fan do not start

• Check that the fuses are not defect.

• Check the settings in the control panel (time, week schedule, auto, manual operating etc.).

• Check if there are any alarm messages.

2. Reduced airflow

• Check the settings of Normal and reduced fan speed.

• Check that the outdoor air damper, if used, opens.

• Change of filter required?

• Cleaning of diffusers/louvers required?

• Cleaning of fan required?

• Is roof unit/air intake clogged?

• Duct system. Check visible duct runs for damage and/or build-up of dust/pollution.

• Check diffuser/louver openings.

3. Cold supply air

• Check set supply air temperature on the control panel.

• Check if overheating thermostat is still alert. If necessary, reset by pressing the button, marked RESET, figure 1).

• Check if the fan thermo switch has tripped, shows as Fan alarm in the control panel. If necessary, reset it.

4. Fluctuating supply air temperature

• Check that the supply air temperature sensor is assembled approximately 3 meters from the heater.

5. Noise/vibrations

• Clean fan impeller.

130323 | A002