Technical data

Rittal Modular Safe LMS 9.3 Operation and functionality
We reserve the right to make technical changes Version 2.2
Operator Manual Page 47
Evaluating system messages on the Comfort controller
Display
screen
System message Possible cause Measures to rectify the fault
A01
Enclosure door
open
Door open or door limit switch incor-
rectly positioned
Close door, position door limit
switch correctly, check connection
if necessary
A02
Enclosure interior
temperature too
high
Cooling capacity too low/unit under-
dimensioned.
Error as a consequence of mes-
sages A03 to A17.
Check cooling capacity
A03 Filter monitoring Filter mat soiled
Clean or exchange; reset the
Comfort controller
A04
Ambient tempera-
ture too high/too
low
Ambient temperature outside of
admissible operating range (+10°C
to +60°C)
Increase or lower the ambient
temperature (e.g. heat or ventilate
room)
A05 Icing hazard
Operational display in case of icing
hazard. Evaporator fan may be
mechanically blocked or defective.
Set the enclosure interior tempera-
ture higher. Check the evaporator
fan; release or exchange if neces-
sary.
Ambient temperature too high
Lower the ambient temperature;
reset the Comfort controller
Condenser soiled Clean the condenser; reset the
Comfort controller
Filter mat soiled Clean or exchange; reset the
Comfort controller
Condenser fan defective Replace; reset the Comfort control-
ler
E-valve defective Repair by refrigeration engineer;
reset the Comfort controller
A06
PSA
H- pressure-
operated switch
PSA
H
- pressure-operated switch
defective
Exchange by refrigeration engineer;
reset the Comfort controller
A07 Evaporator coil
Lack of coolant; sensor in front of or
behind condenser defective.
Repair by refrigeration engineer;
reset the Comfort controller
Condensate discharge kinked or
blocked
Check condensate discharge;
remove any kinks or blockages in
the hose
A08
Condensate
warning
Only in units with optional conden-
sate evaporation
Check the evaporation unit, ex-
change if necessary
A09
Condenser fan Blocked or defective Clear the blockage; exchange if
necessary
A10
Evaporator fan Blocked or defective Clear the blockage; exchange if
necessary