11
12. Comfort control display screen and system analysis
Alarm no.
System message
Cause
Remedy
A01
Open the enclosure door
Door open or door limit switch not correctly
positioned
Close door, position door limit switch correctly,
check connection if necessary
A02
Internal temperature of enclosure too
high
Cooling capacity too low/unit undersize
Sequence errors in messages A03 to A17
Check cooling capacity
A03
Filter monitoring
Filter mat soiled
Clean or exchange
A04
Ambient temperature too high/too low
Ambient temperature outside the permissible
operating range (+10°C to +60°C)
Raise or lower the ambient temperature
(e.g. heat or ventilate the room)
A05
Icing hazard
Icing hazard display according to operating
mode
Increase the nominal value of
the internal enclosure temperature
A06
PSA
H
monitor
Ambient temperature too high
Unit operating limits exceeded
Condenser soiled
Clean
Filter mat soiled
Clean or exchange
Condenser fan defective
Exchange
E-valve defective
Repair by refrigeration engineer
PSA
H
monitor fault
Refrigeration engineer to exchange
A07
Evaporator
Refrigerant fault
Repair by refrigeration engineer
A08
Condensate warning
Condensate drainage does not work
Check condensate drainage; repair kinks or
blockages in the hose as necessary
A09
Condenser fan
Blocked or defective
Clear the blockage; exchange if necessary
A10
Condenser fan
Blocked or defective
Clear the blockage; exchange if necessary
A11
Compressor
Compressor overloaded
(internal winding protection)
Unit switches in again independently
Defective (check by measuring the
winding resistance)
Refrigeration engineer to exchange
A12
Condenser temperature sensor
Open or short circuit
Exchange
A13
Ambient temperature sensor
Open or short circuit
Exchange
A14
Icing temperature sensor
Open or short circuit
Exchange
A15
Condensate warning temperature
Open or short circuit
Exchange
A16
Internal temperature sensor
Open or short circuit
Exchange
A17
Phase monitoring
Incorrect rotary field/phase absent
Exchange two phases
A18
EPROM error
A19
LAN/Master-Slave
Master and slave not linked
Setting or check cable
A20
Voltage drop
Fault display is not illustrated
Event is saved in the log file
E0
Display signal
Connection problem (display and control board)
Reset by means of power supply (OFF/ON)
Cable faulty; plug connection loose
Replacement of the boards
The fault displays A03, A06 and A07 are to be reset manually. To do this, hold down the
▲
and
▼
keys simultaneously for 5 seconds.
13. Comfort control programming
Level
Display
screen
changeable
parameter
min.
value
max.
value
Factory
setting
Explanation
1
St
Nominal value of
the internal
enclosure
20
55
35
The nominal value of the internal enclosure temperature is set at the factory to 35°C and is
variable over a 20°C range to 55°C.
2
Fi
Filter mat
monitoring
10
60
(99 = off)
99
For activation of filter mat monitoring, the display is to be set to a minimum of 10 K above
the temperature difference shown in programming mode “Fi”; filter mat monitoring is
switched off at the factory. (Display 99 = off).
3
Ad
Master-slave
programming
0
19
0
see 8.3 “Cooling unit programming”
4
CF
Temperature
conversion
0
1
0
The temperature display can be switched from °C (0) to °F (1). The corresponding LED
displays the current unit of temperature.
5
H1
Temperature
switching
2
10
5
The cooling unit is set in the factory for a switching cycle of 5 K. This parameter should only
be changed after agreement with the manufacturer.
6
H2
Difference for error
message 2
3
15
5
If the internal enclosure temperature exceeds the set value by more than 5 K, then error
message 2 (internal enclosure temperature too high) appears on the display terminal. The
difference of 5 K can be changed if required over the rang 3 K to 15 K.
7
A1
Relay connection
0
2
0
The fault messages (1 to 19) depicted in the display can also be evaluated using two
potential-free fault message relays. Comfort control provides the option to group fault
messages accordingly and assign them to both fault message relays. The value “1” is to
be programmed for assignment and evaluation of the relevant fault message via relay 1.
If the fault is to be evaluated via relay 2, then the value “2” is to be programmed accordingly.
If the value is set to “0”, the system message appears only in the display.
This accordingly enables the user to define the system weighting himself, by apportioning
between relays 1 and 2.
8
A2
Relay connection
0
2
0
9
A3
Relay connection
0
2
0
10
A4
Relay connection
0
2
0
11
A5
Relay connection
0
2
0
12
A6
Relay connection
0
2
1
13
A7
Relay connection
0
2
2
14
A8
Relay connection
0
2
1
15
A9
Relay connection
0
2
1
16
A10
Relay connection
0
2
1
17
A11
Relay connection
0
2
2
18
A12
Relay connection
0
2
1
19
A13
Relay connection
0
2
1
20
A14
Relay connection
0
2
1
21
A15
Relay connection
0
2
1
22
A16
Relay connection
0
2
1
23
A17
Relay connection
0
2
1
24
A18
Relay connection
0
2
0
25
A19
Relay connection
0
2
0
03_SK3382_8_11_eng.fm Seite 11 Freitag, 5. März 2004 4:33 16
