AHT Cooling Systems GmbH
page 12
Semi-automatic defrost
Start semi-automatic defrost:
Press button
[MAN. DEFROST]
briefly
„dEF
“ is shown at the display during entire
defrost cycle.
When the semi-automatic defrost is finished it returns
to normal operation. At the display the current
temperature is shown.
84-hour-defrost locker:
If
„---“
is shown on the display, the defrost locker is
activated.
Alarm indication and acknowledgment
Alarm indication:
The
error code
is flashing alternatingly with the
current temperature. Simultaneously the red dot (see
→
Fig. 1 Nr.4) is on.
Some units are equipped with an
acoustic alarm
.
Alarm acknowledgment
:
Error code
and
acoustic alarm:
Press button
[STANDBY RESET]
briefly
.
On the display the current temperature and the red
dot is on. The red dot (see
→
Fig.1 Nr.4) remains
until the error is corrected.
Recall
error code
:
Press button
[STANDBY RESET]
briefly.
Error code is shown for 5 seconds on the
display. Afterwards the current temperature is
shown.
Error codes:
Error code meaning
F1
Sensor error
F2
Sensor error
F4
Sensor error
A90
Check clock settings
E20
High temperature alarm
E21
Evaporator temperature too high
E43
Low temperature alarm
E60
Temperature logger high alarm
E70
Electronic failure
E75
Controller temperature too high
E80
Motor error
E92
Compressor stop due to too high
Controller temperature
E93
Mains supply voltage out of range
E95
Mains supply frequency out of
range
Err
Display communication error
tst
Elektronics in test mode
5 Transport and storage
Examine the unit for transport damage after delivery.
Contact the maintenance service in case of damage
(see
→
chapter 10.4).
WARNING
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).
►
If the unit is damaged contact the
maintenance service (see
→
chapter
WARNING
Transport the unit with forklift trucks. Risk
of injury to persons during collisions.
►
Follow the transport routes of forklift
trucks.
►
Secure the cargo.
►
Forklift trucks must only be operated
by trained persons.
►
Follow maximum stacking heights on
packaging.
NOTICE
•
Material damage
due to transport und storage.
►
Do not expose the unit during storage and
transport to temperatures higher than 70°C (158°F).
►
Transport and store the unit only in the position of
use.
►
Do not mix different types when you stack one
unit above the other.
►
If the device was inclined during transport, wait a
minimum of 2 hours before commissioning.
►
When delivering, ensure continuous accessibility
up to the installation room. (Observe the transit
heights/widths/installation space height and
adequate shunting radii.)
6 Unpacking
Check the unit for damage (bumps, scratches) before
and during unpacking. Contact the maintenance service
in case of damage (see
→
chapter 10.4).
WARNING
Disposal of packaging material and films.
Danger of suffocation.
► Keep packaging material and foils
away from children.
► Do not let children play with them.
WARNING
Damage to the refrigerant circuit. The
refrigerant can escape and create an
explosive gas/air mixture. Risk of fire.
►
Ensure good ventilation.
►
Observe the safety and warning signs
for devices with flammable refrigerants
(see
→
chapter 1.6.2.1).
►
If the unit is damaged contact the
maintenance service (see
→
chapter