8 Troubleshooting
EN
24
Rittal LCU DX
8
Troubleshooting
8.1
General
If there is a malfunction or alarm on the device, a corre-
sponding error message will be displayed on control and
display device 3. In the event of a serious malfunction,
the red LED will be illuminated and the alarm relay will
switch (collective fault signal). The corresponding fault
code may be read from the 2-digit LCD display.
8.2
List of error messages
Note:
For technical queries, or if servicing is re-
quired, please contact Rittal using the ad-
dresses shown in section 15 "Customer
service addresses".
No.
Description of malfunction
LED 1
Operation
LED 2
Timer
LED 3
DEF. FAN
LED 4
Alarm
Malfunction
code in
display
1
Clash between operating modes
5 Hz
E0
2
Communication malfunction between in-
ternal and external unit
5 Hz
E1
3
Temperature sensor for server air intake
defective or missing
5 Hz
E2
4
Pipe temperature sensor T2 defective or
missing
5 Hz
E3
5
Register temperature sensor T2B defec-
tive or missing
5 Hz
E4
6
EEPROM defective
1 Hz
E7
7
Error in external unit
1 Hz
Ed
8
KJR 10 B blocked by operation with re-
mote ON/OFF contacts on the clamping
strip
1 Hz
CP
9
Display cold air or defrosting
Continu-
ous light
Continu-
ous light
