HBDF mk2 instruction manual 15 EN
June - 2021 WWW.HBPRODUCTS.DK
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LED indication
1)
Green LED, flash indicates power supply, And DI external start signal is ON.
2)
Red LED indicates Defrost mode or sensor error (Outside measuring range).
LED signal
ON/OFF/Frequency
Functionality
Green
On or flash
Supply voltage connected
Flash (Run-In mode)
Run-in start signal / operation.
OFF
No supply voltage
Red
Flash
Defrost mode “ start”
Flash quickly
Defrost mode “stop”
OFF
Defrost fan/sensor delay (timer end)
Fault Detection
Fault
Reason
Correction of fault
No LED is on / no function
No supply to the sensor or defective
cable.
Check for fault in the power supply
or replace the supply cable.
Sensor does not provide a useable
mA signal and relays does not work
The “Enable start/stop” is set to on
and no digital signal is provided
Set the Enable start/stop is set to off
if you don’t like to use this function.
Red LED is flashing
Power supply is too small.
Install a power supply with a
capacity of at least 30 W.
Very high actual measurement
(above 5000 pF)
The wire is shorted to the evaporator
fins
Make sure the end of the wire is
outside the evaporator and use the
terminal connector.
If that doesn’t solve the problem the
wire has to be replaced.
No analog output or Relay contact
activation
There may be bad ground
connection to the frame.
Clean the metal surface and protect it
with special compound/grease.
Practical measurement of output signals: 4-20 mA signal: Function and stability of the 4-20 mA signal can be checked
by connecting a hand-held multimeter. If the supply is connected and the power LED flashes and there is no output
signal, the electronics may be defective.
Sensor Repair
In case of defects with the sensor, it will typically only be necessary to replace the electronical part.
Complaints are processed by HB Products’ dealers/distributors.
Please consider their complaint procedures before returning the sensor.
Spareparts
Position
Designation
Specification
Product number
1
Mechanical part
10 m wire
HBDF-MEK-10M
Mechanical part
20 m wire
HBDF-MEK-20M
Mechanical part
30 m wire
HBDF-MEK-30M
2
Electronic part
PCB
HBDF-MK2-EL
3
Temp. sensor
Pt1000-Cable type
HBPT-Pt1000 cable
4
Communication cable
HB USB cable
HBxC-USB
Note! All terminals are protected against improper termination for a supply voltage up to 40 V. If
the supply voltage is higher than 40 V, the electronics will be damaged.
