Pfannenberg Units With Standard-Controller; Fault Not Rectified; Warranty Conditions - Pfannenberg DTT 601 Serie Instrucciones De La Instalación Y Del Uso

13.4 Pfannenberg units with Standard-Controller

The following table describes the technical cause as well as the fault remedy as a function of the unit characteristics.
Pos Unit characteristics
1
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
2 Compressor:
Internal fan:
External fan:
Status LED:
ult signal contact:
3 Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
4
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
5
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
6
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
7
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
8
Internal fan:
External fan:
Status LED:
Fault signal contact:
Compressor:
9
Internal fan:
External fan:
Status LED:
Fault signal contact:
* 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.

13.5 Fault not rectified?

If the fault is not rectified now, please call authorised technical personnel.

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 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;
16
OFF There is no supply of voltage to the unit.
OFF
OFF
OFF
open
ON The test mode of the unit is active. This
ON mode is left automatically at the latest after
ON 60 s.
flashing (seq. 3)
open
OFF The input for the door limit switch is open
OFF e.g. as a result of a switch cabinet door not
OFF closed or a bridge not set.
flashing (seq. 1)
closed
OFF High pressure pressostat or motor
ON protection switch has responded
ON (overheating). Compressor switches on
flashing (seq. 2) again automatically after the fault has been
open remedied (cooling) with a delay of 30 s.
OFF Unit adjustment by means of the coding
OFF switch on the control electronics is not
OFF plausible. The unit setting must be changed.
flashing (seq. 1)
open
ON The upper temperature limit (T
ON switch cabinet has been exceeded.
ON
flashing (seq. 1)
open
OFF
The lower temperature limit of the switch
ON
cabinet has been exceeded
OFF
or
flashing (seq. 1)
the water level in the condensate collection
open
pan is too high (only with optional level
monitoring).
ON
The temperature sensor TS1 is defective or
ON
has not been detected.
ON
flashing (seq. 2)
open
normal control
In the switch cabinet, if a short circuit in the
characteristics
air circuit* occurs, no effective cooling of the
ON
switch cabinet is possible.
normal control
Air-conditioning is requested within short
characteristics
cycle times.
flashing (seq. 1)
open
Technical causes
) of the
L2
• for the exchange of parts by non-authorized personnel.
In order to maintain your warranty rights please observe the following
when returning the unit:
• Include a detailed description of the defect and the DRU(RMA)
number issued by Pfannenberg with the cooling unit.
• 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.
Fault remedy
Check back-up fuse and/or connect supply
voltage
The unit switches to test mode once after
each new connection to the power supply.
No remedy of fault necessary.
Insert link, close door contact switch or,
with an engaged door contact switch,
close the door
Clean or replace filter or clean heat
exchanger in the external circulation.
Possibly check the power dissipation in the
switch cabinet to the installed cooling
capacity of the air conditioner.
Observe the operating instructions and
note the coding key of the coding switch.
Clean or replace filter or clean heat
exchanger in the external circulation.
Possibly check the power dissipation in the
switch cabinet to the installed cooling
capacity of the air conditioner.
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.
Replace the contact sensor TS1 or replace
the complete electronic control with a
fixed-wired temperature sensor
Get in touch with the service department.
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.
085 408 097a