Pfannenberg DTI 9441 - Pfannenberg Units with Standard- or Comfort-Controller; Warranty Conditions

16
GB
085408064e
13.3 Pfannenberg units with Standard- or Comfort-Controller
The following table describes the technical cause as well as the fault remedy as a function of the unit characteristics.
Pos
Unit characteristics
Technical causes
Fault remedy
1
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
OFF
OFF
OFF
OFF
open
There is no supply of voltage to the unit.
Check back-up fuse and/or connect supply
voltage
2
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
ON
ON
ON
flashing (seq. 3)
open
The test mode of the unit is active. This
mode is left automatically at the latest after
60 s.
The unit switches to test mode once after
each new connection to the power supply.
No remedy of fault necessary.
3
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
OFF
OFF
OFF
flashing (seq. 1)
closed
The input for the door limit switch is open
e.g. as a result of a switch cabinet door not
closed or a bridge not set.
Insert link, close door contact switch or,
with an engaged door contact switch,
close the door
4
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
OFF
ON
OFF (Standard-Controller)
ON (Comfort-Controller)
flashing (seq. 2)
open
High pressure pressostat or motor
protection switch has responded
(overheating). Compressor switches on
again automatically after the fault has been
remedied (cooling) with a delay of 30 s.
Clean filter mat or heat exchanger in the
external circulation. Possibly check the
power dissipation in the switch cabinet to
the installed cooling capacity of the air
conditioner.
5
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
OFF
OFF
OFF
flashing (seq. 1)
open
Unit adjustment by means of the coding
switch on the control electronics is not
plausible. The unit setting must be changed.
Observe the operating instructions and
note the coding key of the coding switch.
6
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
ON
ON
ON
flashing (seq. 1)
open
The upper temperature limit (T
L2
) of the
switch cabinet has been exceeded.
Clean filter mat or heat exchanger in the
external circulation. Possibly check the
power dissipation in the switch cabinet to
the installed cooling capacity of the air
conditioner.
7
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
OFF
ON
OFF
flashing (seq. 1)
open
The lower temperature limit of the switch
cabinet has been exceeded
or
the water level in the condensate collection
pan is too high (only with optional level
monitoring).
These faults can only occur with the Comfort-
Controller.
Additionally install a heater or a fan-forced
heater if necessary.
Check drain for blockage or fouling. Check
for correct installation of the run-off tube.
Note that particularly much condensate is
produced if the switch cabinet is poorly
sealed or the doors are constantly open.
8
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
ON
ON
ON
flashing (seq. 2)
open
The temperature sensor TS1 is defective or
has not been detected.
Replace the contact sensor TS1 or replace
the complete electronic control with a
fixed-wired temperature sensor
Get in touch with the service department.
9
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
normal control
characteristics
ON
normal control
characteristics
flashing (seq. 1)
open
In the switch cabinet, if a short circuit in the
air circuit* occurs, no effective cooling of the
switch cabinet is possible.
Air-conditioning is requested within short
cycle times.
Relocate the power components in the
switch cabinet or relocate the cooling unit.
Select a top-mounting cooling unit or side-
mounting cooling unit as an alternative
depending on the space situation.
* Air short-circuit: An air short-circuit develops, if cool air at the air outlet of the cooling unit is led by means of power components built directly in front of it in an
unfavourable way, not into the switch cabinet, but directly to the air inlet of the cooling unit. The consequence is overheating of the power components due to the
lack of cooling.
When using a unit with Multi-Controller, the fault indication is given in the form of an error code on the control unit display. To classify the
error code, refer to the „Operating Instructions Pfannenberg Multi-Controller“ provided with the documentation for the unit.
14 Warranty
Conditions
Warranty becomes null and void:
• in case of improper usage of the unit, noncompliance with ope-
rating conditions or nonobservance of instructions;
• If operated in rooms in which corrosives or acids are present in
the atmosphere;
• in case of damage caused by contaminated or jammed air filters;
• if a non-authorised person interrupts the cooling circulation,
modifies the unit or changes the serial number;
• in case of damage caused by transport or by accidents;
• for the exchange of parts by non-authorized companies.
In order to maintain your warranty rights please observe the following
when returning the unit:
• Enclose an exact description of the fault in the shipping package.
• Enclose proof of delivery (delivery note or copy of invoice).
• Return the unit together with all accessories; use the original
packaging or packaging of equivalent quality, send the unit frei-
ght prepaid and covered by an adequate transport insurance.
Observe the hints on transport mentioned in section 2.