User manual
Document no. : 031221
Version : V3.3
MC 785-ECU
Client: Heinen & Hopman
Page: 6 of 12
P 40
P 41
P 45
P 46
P 47
P 48
Delay time for the rotation direction of the fan.
Function external contact
0 =
None
1 =
Manual rotation direction of fan with
UP
+
DOWN
keys
2 =
Autom. rotation direction of fan with external contact
3 =
Fan off with external contact
Delay time min. temperature alarm
Delay time max. temperature alarm
Delay time min. pressure alarm
Delay time max. pressure alarm
0..240
0..3
0..999
0..999
0..999
0..999
Seconds
-
Seconds
Seconds
Seconds
Seconds
60
0
0
0
0
0
P 90
P 91
P 95
P 96
P 97
Network number
Log interval
Software version no.
Serial number
Production date
1..250
0..120
-
-
-
-
Minutes
-
-
Year/Wk
1
0
-
-
-
5
Sensor calibration
The sensors can be calibrated with the parameters P 01 and P 03. If the temperature sensor register
0.2°C too much, for example, then parameter P1 should be set at -0.2°C.
6
Alarms
The alarm relay is energized in normal operation and will de-energized when an alarm occurs (fail
safe alarm). This means that an alarm is given if the power supply fails. During an alarm the alarm
warning in the display will blink. Depending on the alarm and the Internal Parameters, the output will
be set at a certain output level.
An alarm can be caused by:
- Sensor failure (E1 or E2).
- Sensor measures a minimum or maximum alarm (t.LO, t.HI, P.LO, P.HI).
NOTE
:
Minimum and maximum alarms are only detected 4 minutes after turning on or after
power failure.
The alarm relay can be reset by pressing a key. The error message remains in the display as long as
the error exists.
Temperature alarm:
t.LO
= Minimum temperature alarm
t.HI
= Maximum temperature alarm
Pressure alarm:
P.LO = Minimum pressure alarm
P.HI = Maximum pressure alarm
Sensor failure:
E1
= Temperature sensor defective
E2
= Pressure sensor defective
