Push-Button Indications; The Fan - Dantherm CDP 75 Wartungsanleitung

Failure on the high-pressure pressostat or the thermal relay
Lightning – constant green + Drop – flashing on and off in green + Triangle – constant red – (1)(2)(3)
A constantly green Lightning indicates that power is on. The Drop and the Triangle LEDs flash on and off in green
and lights up constantly in red, respectively, to indicate that the HP pressostat or the thermal relay has switched off
the compressor and that the unit has been cut off. If the high-pressure pressostat has registered a too high pressure
in the cooling circuit, caused by a too high temperature across the condenser, the compressor will be switched off
and the unit stops. The thermal relay also switches off the compressor and stops the unit, if the temperature in the
compressor gets too high.
If the unit switches off again after having reset the HP pressostat and the thermal relay, the unit must be checked by
a service engineer. (See section 7. Faults and how to remedy them)
The flashing drop is switched off by turning the unit OFF and ON on the main switch.
Fire – constant green - (4)
If the unit is supplied with a water heating coil, this LED will light up in green, when heat is connected.

4.3 Push-button indications

Push-buttons on the inspection side of the unit allows switching on and off dehumidification, heating coil and fan.
To switch on or off the functions, the setting of the push-buttons should be as follows:
OFF (A) Resetting (B)
Drop – (5)
By means of the push-button with a drop symbol, dehumidification can be switched off (A) or on (B).
Fire – (6)
By means of the push-button with a fire symbol, the heating coil can be switched off (A) or on (B).
Fan – (7)
In position (A) the fan is switched off and only runs if required – i.e. in accordance with the demand for
dehumidification and/or heating.
In position (B) the fan run continuously – i.e. independent of the demand for dehumidification and/or heating.

4.4 The fan

If a water heating coil is used, the fan will start when heat is switched on. The fan continues to run for 30 seconds
after the heat has been switched off. On condition, however, that the water heating coil is connected to the control
signal through terminal points 1 and 2. If the water heating coil is controlled externally and is not connected to the
unit control, the fan will not automatically be switched on when the the water heating coil is connected.
The control of CDP 75/125/165 has an option for connecting an external ON/OFF switch for continuous fan
operation – allowing the fan to be running independently of the dehumidification and/or heating requirements. The
switch is connected to terminals 7 and 8 and the outlet for the switch is 12 V. The bridge between terminals 7 and 8
has to be removed first
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