Defining System Messages For Evaluation - Rittal CS 9761.212 Montageanleitung Und Bedienungsanleitung

6 Operation

6.1.6 Defining system messages for evaluation

System messages are shown on the display screen
EN
of the Comfort controller via the displays A1 to A20
and E0.
Progr. Display
level screen
7 A1
8 A2
10 A4
11 A5
12 A6
13 A7
14 A8
15 A9
16 A10
17 A11
18 A12
19 A13
20 A14
21 A15
22 A16
23 A17
24 A18
25 A19
Tab. 3: System messages which may be evaluated via relays
System messages A1 – A19 may additionally be
evaluated via a relay with floating changeover
contact; refer to the connection diagrams under
"4.5.2 Installing the power supply", page 30:
– Terminal 3: NC (normally closed)
– Terminal 4: C (connection of the supply voltage
to the system message relay)
– Terminal 5: NO (normally open)
The NC and NO definitions refer to the de-energised
state. As soon as power is applied to the cooling unit,
the system message relay picks up, so that the relay
contact changes status (contact 3 – 4 open; contact
4 – 5 closed).
36
Para- Min. Max. Type or location of fault
meter value value
0 2 0 Enclosure door open
0 2 0 Internal temperature of enclosure too high
0 2 0 Ambient temperature too high/too low
0 2 0 Icing hazard
0 2 1 PSA
0 2 2 Evaporator coil
0 2 1 Condensate warning
0 2 1 Condenser fan blocked or defective
0 2 1 Evaporator fan blocked or defective
0 2 2 Compressor
0 2 1 Condenser
0 2 1 Ambient temperature sensor
0 2 1 Icing temperature sensor
0 2 1 Condensate warning temperature sensor
0 2 1 Internal temperature sensor
0 2 1 Phase monitoring
0 2 0 EPROM
0 2 0 LAN/Master-slave
A more detailed explanation of the system messages
may be found in section "6.1.8 Evaluating system
messages", page 37.
See also Fig. 9 on page 35.
H
pressure-operated switch
This is the normal operating state of the cooling unit.
As soon as a system message occurs or the power
supply is interrupted, the relay drops out.
Program system messages with the following values:
0: System message is not sent to the system
message relay, but merely appears in the
display
1: System message is evaluated by relay 2
2: System message is evaluated by relay 2
If 1 or 2 is selected, the system will automatically
generate to relay 2, because relay 1 is used for the
heating function.
RITTAL outdoor cooling unit assembly and operating instructions