Pfannenberg DTI 6x01 - Manual (Page 18)

GB
085 408 121a 18/60
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 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
flashing (seq. 2)
open
High pressure pressostat or motor
protection switch has responded (over-
heating) or
Wrong connection assignment.
Compressor switches on again auto-
matically after the fault has been
remedied (cooling) with a delay of 30 s.
Clean or replace filter or clean heat ex-
changer in the external circulation. Possibly
check the power dissipation in the switch
cabinet to the installed cooling capacity of the
air conditioner.
Check the connection assignment, see chap-
ter 8.4 (incorrect phase sequence)
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 or replace filter or clean heat ex-
changer 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 collec-
tion pan is too high (only with optional
level monitoring).
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 defec-
tive 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 de-
pending 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.
13.5 Fault not rectified?
If the fault is not rectified now, please call authorised technical personnel. ([email protected])
14 Warranty Conditions
Warranty becomes null and void:
• in case of improper usage of the unit, noncompliance with oper-
ating conditions or non observance 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;
• for the exchange of parts by non-authorized personnel.
In order to maintain your warranty rights please observe the follow-
ing 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
freight prepaid and covered by an adequate transport insurance.
Observe the hints on transport mentioned in section 2.