Operating manual
Document nr. : 010346
Version :
V1.4
MC 785-DF KLIMA ALFANET
Client : General
Page :
14 of 20
6.
Sensor calibration.
With parameters P10, P11, P12, P180, P181, P182 and P183 the temperature sensors and RH sensor can be
calibrated.
Indicates the temperature sensor e.g. 0,2°C too much, the according temperature offset should be set 0,2°C
lower.
7.
Alarms.
If the extra relay is set as watch alarm (parameter P20=0), in normal mode the relay is on and drops during
alarm. In this mode also an alarm is given if the power supply is lost. If the extra relay is programmed as control
alarm (P20=1), in normal mode the relay is off and switches on during alarm.
During alarm the alarm LED on the front flashes. Depending on the setting of the Internal Parameters the
control will stop or continue. An alarm can be caused by:
Sensor failure :
E1
= Temperature sensor broken
E2
= RH sensor broken
E7
= Defrost sensor broken
Temperature alarm :
E3
= Minimum temperature alarm
E4
= Maximum temperature alarm
RH alarm :
E5
= Minimum RH alarm
E6
= Maximum RH alarm
The temperature alarms are shown in the temperature display (left top). The RH alarms are shown in the RH
display (right top).
By pressing the
RESET ALARM
key the extra relay will, if configured as alarm relay, be reset. The error
message remains during the failure in the display. Also, the alarm LED will continue to flash.
