Control Board - Dantherm HEX 30 Service Manual

Control board

Control system
8
The HEX 30 is controlled via a controller that controls the speed
of the fans.
The key features of the controller are:
• Onboard temperature sensor (NTC type)
• Microprocessor based control in accordance with prese-
lected strategy
• Minor and major alarm output
• Polarity protection
• Input voltage ÷ 40 V DC to -60 V DC
• Both alarm outputs are "Normally closed" (NC)
• Minor alarm is high temperature inside the cabinet >60 °C
• Major alarm is when the internal, external or the tempera-
ture sensor fails
Part
RS 232 To be used for factory testing or to get further information from
the controller
Alarm LED Gives signal about alarms:
• Flashing = minor alarm (high temperature)
• Constant = major alarm (fan or sensor failure)
Both alarms can be monitored (potential free contact) on the
power/alarm plug.
See more about fault finding in section "Fault finding guide",
page 21
Sub-D 9 pin, male Power and alarm plug
Pin designation:
1
2
3
4
5
6
7
8
9
Function
N/C
+ 48 V DC
+ 48 V DC
Minor alarm +
Major alarm +
0 V DC
0 V DC
Minor alarm ÷
Major alarm ÷