Pfannenberg Multi-Controller Manual De Instrucciones De Servicio página 12

The following table describes the technical cause as well as the fault remedy as a function of the unit characteristics.
Pos Unit characteristics
-- Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
tXX
1 Compressor:
Internal fan:
External fan:
Status LED:
ult signal contact:
E1 Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E2
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E3 Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E4
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E5 Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E7
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E8 Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E10
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
E12
Compressor:
Internal fan:
External fan:
Status LED:
Fault signal contact:
Table 3: Error numbers and their meaning (error diagnosis)
'xx' stands for the already elapsed time in Test mode (range 30 to 0).
* 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.
12
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 protection
ON switch has responded (overheating).
ON Compressor switches on again automatically
flashing (seq. 2) after the fault has been remedied (cooling)
open with a delay of 30 s.
OFF The motor protection switch on the
ON compressor has responded (overheating).
ON Compressor switches on again
flashing (seq. 2) automatically after the fault has been
open remedied (cooling) with a delay of 30 s.
ON The temperature sensor TS1 is defective or
ON has not been detected.
ON
flashing (seq. 2)
open
ON The temperature sensor TS2 is defective or
ON has not been detected.
OFF
flashing (seq. 2)
closed
OFF The temperature has fallen below the lower
ON temperature limit (T
OFF
flashing (seq. 1)
open
ON The upper temperature limit (T
ON switch cabinet has been exceeded.
ON
flashing (seq. 1)
open
normal control In the switch cabinet an air short-circuit*
characteristics has occurred, i.e. no significant cooling of
ON the switch cabinet is possible. Air-
normal control conditioning is requested within short cycle
characteristics times.
flashing (seq. 1)
open
OFF The water level in the condensate drip pan
ON is too high (only with top-mounting units!).
OFF
flashing (seq. 1)
open
Technical causes
) of the switch cabinet
L1
) of the
L2
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 bridge in accordance with passage
14, connect door limit switches or if door
limit switches are inserted close door.
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.
Clean the filter material or clean heat
exchanger in the external circulation
system. Check the installation of the unit
for an 'air short circuit'* (i.e. unwanted air
is drawn in via a leak) through the
equipment installed in the switch cabinet. If
necessary relocate the respective
components.
The temperature sensor TS1 must be
replaced. Get in touch with the service
department.
Temperature sensor TS2 must be replaced.
The temperature sensor does not have an
influence on the cooling function of the cooling
unit. Contact Customer Service.
Additionally install a heater or a fan-forced
heater if necessary.
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.
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. The
error is reset by opening the door contact.
Check drain for blockage or fouling. Check
to ensure correct installation of the
drainage hose in the case of top-mounting
units. Note that particularly much
condensate is produced if the switch
cabinet is poorly sealed or the doors are
constantly open.
085 505 518b