HDI-03-W
Mar ‘15
- 18 -
Refrigerated Air Dryers (cont’d)
Typical Dryer Operation.
The Dryer will operate as follows:
•
Pressing the ‘On/Off’ Button for 3 seconds will start the Unit
•
There is a time delay of up to 2 minutes before the Refrigerant Compressor starts.
•
The Condenser Fan will start approx. 20 to 30 seconds there-after.
•
The Fan will not normally run at full speed, this indicated by a flashing LED
•
The readout will initially show ambient temperature indicated by 3 horizontal bars on the readout
•
Once the Fan and Compressor start, the dew point of the Unit will decrease to approx. 1°C, this indicated
by 1 or no horizontal bars.
•
Pressing the ‘On/Off’ Button (when the Unit is operating) will run the Fan at full speed for several
seconds, after which the Unit will stop. (The LED will be on continually while the Fan runs at full speed.)
•
As well as showing the dew point, the readout may indicate several fault codes as suggested below.
Typical Fault Codes.
The readout will indicate a variety of ‘fault codes’, the most common being as follows:
A
t
H
Energy Saving Mode.
•
The Dew Point has been running at below -1°C for over 6
minutes.
•
The Unit will automatically restart operation at 6°C.
Temperature Probe Alarm.
•
The Temperature Probe is not working properly. It may
not be connected to the Board, or the Probe may be
defective.
•
Replace the Probe if necessary.
High Temperature Alarm.
•
The Dew Point has been running at above 12.5°C for
over 6 minutes. The Unit must be manually turned off and
on.
•
The fault could be caused by a dirty radiator, high
ambient temperature, a faulty Fan, or a faulty refrigerant
Compressor, to name only a few.
P F I
A
S
E
O N
The Unit is ON with a normal load and is operating correctly.
