AHT Cooling Systems GmbH
43
List of fault codes:
Fault code* Meaning
“OnF”
Thermostat emergency operation
“noL”
Control board defective
E00
Fault in electronic expansion
valve
E01
Fault in suction pressure sensor
E02
Fault in suction gas temperature
sensor (suction manifold sensor)
E03
Fault in air intake sensor
E04
Fault in air outlet sensor
E05
Fault in slat sensor
E06
Fault in high-pressure sensor
E07
Fault in compressor safety chain
E08
Fault in heat gas temperature
sensor (pressure tube sensor)
E09
Fault in internal temperature
sensor (Goods room)
E10
Supply voltage too low/too high
E11
Low battery voltage (see
→
Chapter 10.2.3)
E12
Fault in software class B (safety
software)
E13
Fault in EEPROM
(control board defective)
E32
Suction pressure too low
E33
Superheating too low
E34
Superheating too high
E35
Internal temperature too high
(goods room)
E36
Internal temperature too low
(goods room)
E37
Control temperature too low
E38
Control temperature too high
E39
Run-time fault in defrosting
E40
Fault in internal memory
E41
Heating gas temperature too
high (pressure tube sensor)
E42
Time-out
Valve opening 100%
E43
Condensation pressure too high
E44
External alarm
Alarm acknowledgment
Acoustic signal/buzzer:
Press the
[2]
key.
Fault code/status LED:
Cannot be acknowledged. It appears until
the fault has been fixed.
4.4 Operation of Night blind/device
lighting function
The following operating elements are available for
opening/closing the night blind and switching the
device on/off during
night operation
(device-
specific):
- Operating element (see
→
Chapter 4.4.1)
- Day/night switch (see
→
Chapter 4.4.2)
4.4.1 Operating element night
blind/device lighting
(only for R-
134a devices)
An operating element (device-specific) is available
for opening the night blind and switching on the
device lighting
during night-time operation;
see
→
Chapter 4.3 and Fig. 4.
Open the night blind and switch on the device light
(temporary activation of daytime operation):
Press the
[1] key
for at least 5 s.
Close the night blind again and switch off the device
lighting:
Occurs automatically after 60 min.
4.4.2 Day/night switch (only for R-134a
devices)
Switch "ON":
On all devices in the device network, the night
blind is opened and the device lighting is
switched on.
Switch “OFF”:
On all devices in the device network, the night
blind is closed and the device lighting is switched
off.
Fig. 5: Day/night switch
5 Transport and storage
Check the device for transport damage after
delivery. Contact the maintenance service in case of
damage (see
→
Chapter 10.4).
WARNING
For devices of type R-290:
Damage
to refrigerant circuit.
The refrigerant can escape and
create an explosive gas/air mixture.
Risk of fire.
►
Do not expose the device during
storage and transport to
temperatures higher than 70°C
(158°F).
►
Ensure good ventilation.
►
Observe the safety and warning
signs for devices with flammable
refrigerants (see
→
Chapter 1.6.2.1).
►
Contact the maintenance service
(see
→
Chapter 10.4).
