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English
Each motor has an error message contact which is closed during fan operation. The unit switches off
when the contact opens. After correction of the fault (see 14.2. Fault diagnosis chart), the unit can
then be restarted.
If a fault occurs on the fans or EC-controller, the device will switch off and an error message will be
displayed. To reset the EC-controller, the electricity supply must be switched off at the main switch
for at least 20 s.
9.10. Functions
9.10.1 Fan error message contact
The capacity of an external warm water coil is steplessly controlled by the heating valve. When heat
is required, the heating valve is opened and at the same time, the output for an external circulating
pump is put into operation. An installed heating coil is protected against icing by temperature moni
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toring or by an optional frost protection thermostat. If the supply air temperature drops below the tem
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perature set on the anti-freeze controller, the valves close and the circulating pump runs constantly,
the heating valve opens and a fault message is given. The device automatically runs „PRE-RINSING“
until heating provides the desired operation temperature. The unit restarts then automatically. If the
desired operating temperature can not be achieved after 20 min., an error message is displayed.
Afterwards, the unit turns itself completely off until the fault is repaired. (see 14.2. Error table F07)
9.10.2 Hot water coil
The unit series can be equipped with the electric heat register EHM.
see description EHM module!
9.10.3 Version with electric heating coil
10. Maintenance and repair
10.1. Important notes
•
Electricity warning (hazardous voltage)!
»
Failure to observe the hazard may result in death, injury or damage to property.
→
Before performing any work on conductive parts, always disconnect the unit complete-
ly from the electricity supply and make sure that it cannot be switched back on again.
•
Never reach into the impeller or other rotating or moving parts.
»
Failure to observe the hazard may lead to serious injury.
→
Work may only be performed once the impeller has come to a complete halt.
•
Caution! Burning hazard.
»
Failure to observe the hazard may result in personal injury and/or damage to property.
→
Do not touch the surface until the motor and heater have cooled.
Maintenance and repairs may only be performed by specialist personnel in accordance with this
installation and operating manual and the regulations in force.
Do not repair defective or damaged units yourself, but report the damage or faults to the manufac
-
turer in writing.
• Unauthorized repairs may cause personal injury and / or damage to property, in
which case the manufacturer‘s guarantee or warranty will not apply.
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