Rittal enclosure cooling unit
17
6 Operation
EN
6.1.7
Defining system messages for evaluation
System messages are shown on the display screen of
the e-Comfort controller via the displays A1 to A20 and
E0.
A more detailed explanation of the system messages
may be found in section 6.1.9 "Evaluating system mes-
sages".
See also fig. 19 on page 16.
The system messages A1 – A19 may also be evaluated
via two floating system message relays. In this way, one
of the two system message relays may be allocated to
each system message.
System message relays with normally open contact, see
wiring diagrams at section 4.6.3 "Installing the power
supply":
– Terminal 3: NO (normally open, relay 2)
– Terminal 4: C (connection of the supply voltage to the
system message relay)
– Terminal 5: NO (normally open, relay 1)
The definition NO refers to the de-energised state. As
soon as power is applied to the cooling unit, both sys-
tem message relays (relay 1 and 2) energise.
This is the normal operating state of the cooling unit. As
soon as a system message occurs or the power supply
is interrupted, the corresponding relay will drop out and
open the contact.
The RiDiag II software (available as an accessory, Model
No. 3159.100) allows you to invert the system message
relay circuit.
In the normal operating state the two relays will then
drop out. If a system message occurs, the relevant relay
will energise and the contact will close.
Progr.
level
Display
screen
Min.
value
Max.
value
Factory
setting
Type or location of fault
7
A1
0
2
0
Enclosure door open
8
A2
0
2
0
Internal temperature of enclosure too high
9
A3
0
2
0
Filter monitoring
10
A4
0
2
0
Ambient temperature too high/low
11
A5
0
2
0
Icing hazard
12
A6
0
2
1
PSA
H
pressure switch
13
A7
0
2
2
Evaporator coil
14
A8
0
2
1
Condensate warning
15
A9
0
2
1
Condenser fan blocked or defective
16
A10
0
2
1
Evaporator fan blocked or defective
17
A11
0
2
2
Compressor
18
A12
0
2
1
Condenser
19
A13
0
2
1
Ambient temperature sensor
20
A14
0
2
1
Icing temperature sensor
21
A15
0
2
1
Condensate warning temperature sensor
22
A16
0
2
1
Internal temperature sensor
23
A17
0
2
1
Phase monitoring
24
A18
0
2
0
EPROM
25
A19
0
2
0
LAN/Master-Slave
Tab. 4:
System messages that can be evaluated via relays
Note:
This setting can only be made using the
RiDiag II software.
Содержание Rittal 3273 Series
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