Binder KMF-720 - Refrigeration and Humidity Issues; Controller Malfunctions

KMF (E5.2) 06/2014 page 84/99
Fault description
Possible cause
Required measures
Refrigerating performance
Low or no refrigerating perfor-
mance.
Ambient temperature > 25 °C / 77
°F (chap.3.4).
Select cooler place of installation.
Combination of tempera-
ture/humidity values not in the
optimum range (see temperature
humidity diagram, Figure 19).
Select combination of tempera-
ture/humidity values in the opti-
mum range (chap. 12).
Compressor not turned on.
Contact BINDER service.
Electro-valves defective.
No or not enough refrigerant.
Too much external heat load.
Reduce heat load.
Humidity
Humidity fluctuation:
Control accuracy of ± 3 % r.F. is
not reached.
Door gasket defective.
Replace door gasket.
Door opened very frequently. Open doors less frequently.
Humidity fluctuation, together
with temperature fluctuation >
1 °C with a set-point ca. 3 °C
above ambient temperature.
Place of installation too hot.
Select cooler place of installation
or contact BINDER service.
Low or no dehumidification.
Capillary tube blocked
Contact BINDER service.
Not enough refrigerant.
Icing at the evaporator plates.
Set-point was too long below
ambient temperature.
Defrost the unit (chap. 13).
Condensation at the walls of the
inner chamber.
Combination of tempera-
ture/humidity values not in the
optimum range (see temperature
humidity diagram, Figure 19)
Select combination of tempera-
ture/humidity values in the opti-
mum range (chap. 12).
Set-point was too long below
ambient temperature, icing in the
preheating chamber.
Defrost the unit (chap. 13)
Low humidity and temperature
accuracy
Fan speed has been reduced. Set fan speed to 100%.
Buzzer at the lower part of the
unit sounds.
Water level in the steam module
is too low (filling time-out)
Turn off and on the humidity
switch (3). In case of alarm re-
peat after approx. 2 minutes,
contact BINDER service
Controller
No unit function
(dark display).
Display mode “Standby” active.
Press any controller key.
Main power switch turned off.
Turn on the main power switch.
No access to menu “User set-
tings”“.
User code incorrect. Contact BINDER service.
Wrong temperature alarms, dis-
turbance of temperature accuracy
Temperature unit changed to °F.
Set temperature unit to °C (chap.
6.4).
Chart recorder function: meas-
ured-value memory cleared; in-
formation lost.
New setting of storage rate.
Change the storage rate ONLY if
the previously registered data are
no longer required (chap. 7).
Controller does not attain set-
points entered in Manual Mode.
Button “EXIT” or “AUTOMATIC”
has been hit: Unit is in Idle Mode.
Change to Manual Mode (chap.
8).
Controller does not attain pro-
gram set-points.
Button “EXIT” or “AUTOMATIC”
has been hit: Unit is in Idle Mode.
Start the program again (chap.
9.9).