1.1.4 | Semiautomatic defrost
AHT Cooling Systems GmbH | en
10 / 16
398051_4_0119
1.1.4
Semiautomatic defrost
Start semi-
automatic defrost:
Press
for at least 5 s.
„dfb“ appears briefly. Then
„dEF“ and the symbol
is
shown on the display.
After semi-automatic defrost, the unit automatically re-
turns to normal operation.
1.1.5
Switch the door heating on and off
(optional)
Switch on door
heating:
Press
for at least 1 s.
The symbol
is shown on
the display.
Switch off door
heating:
Press
for at least 1 s.
The symbol
expires on
the display.
1.1.6
Display and acknowledge alarm
Display alarm
The
error code
is displayed alternately with the cur-
rent temperature until the fault has been rectified.
Depending on the type of error the control element
and / or the symbols
are flashing on the
display.
Depending on the type of error an
acoustic alarm
is
emitted by a built-in buzzer.
List of error codes:
Error code
Meaning
E0
Temperature sensor S1
defective
E1
Temperature sensor S2
defective
E2
Temperature sensor S3
defective
LO
Low temperature alarm
HI
High temperature alarm
Etc
Real time clock fault
EE
Elektronic fault
EF
Elektronic fault
CON
Disconnection inverter to
controller
Acknowledge alarm
Acknowledge
acoustic alarm:
Press
briefly.
Error code
can NOT be acknowledged.
The error code is displayed alternately with the current
temperature until the fault is rectified.
For troubleshooting measures in the event of alarm in-
dications see →Faults in operation.
