Binder MKF 115, Руководство по эксплуатации

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MKF+ MKFT (E3.2) 07/2017 page 85/115
Fault description Possible cause Required measures
Condensation
Condensation at the samples.
Heating-up phase without bedew
protection. Use the bedew protection
(chap. 10).
Heating up very fast.
Select lower heating up speed
(ramp).
Condensation or icing at the
sides of the inner chamber.
Set-point for a long time below ambi-
ent temperature, icing in the preheat-
ing chamber.
Defrost the chamber.
Condensation at the samples
or at the sides of the inner
chamber; notification “1H
PREHEAT PHASE” in the con-
troller display.
Rear power switch (20) turned on
less than 1 hour before operating the
chamber. Turn on the rear power switch
(20) at least one hour before
operating the chamber.
Humidity
Humidity fluctuation:
Control accuracy of
±
2.5 %
r.H. 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 approx. 3
°C above ambient temperature.
Place of installation too hot.
Select cooler place of installa-
tion or contact BINDER service.
No or low dehumidification.
Capillary tube blocked.
Contact BINDER service.
Not enough refrigerant.
No dehumidification; notifica-
tion “1H PREHEAT PHASE” in
the controller display. Rear power switch (20) turned on
less than 1 hour before operating the
chamber. Turn on the rear power switch
(20) at least one hour before
operating the chamber.
Icing at the sides of the inner
chamber. Set-point was too long below ambient
temperature.
Defrost the chamber (chap. 15).
Condensation at the sides of
the inner chamber.
Combination of temperature/humidity
set-point values not in the optimum
range (see temperature humidity
diagram, Figure 19)
Select combination of tempera-
ture/humidity set-point values in
the optimum range (chap. 14).
Temperature set-point was too long
below ambient temperature, icing in
the preheating chamber.
Defrost the chamber (chap. 15)
Combination of temperature/humidity
set-point values leads to falling below
the dew point. Select suitable combination of
temperature/humidity set-point
values.
Controller
No chamber function
(dark display).
Display mode “Standby” active. Press any controller key.
Main power switch turned off. Turn on the main power switch.
No entries to controller keypad
possible. Notification “KEY
LOCK” is displayed
Keyboard locking (option) activated.
Unlock keyboard locking (chap.
16.5).
No access to menu “User set-
tings”.
User code incorrect. Contact BINDER service.
Wrong temperature alarms,
disturbance of temperature
accuracy
Temperature unit changed to °F.
Set temperature unit to °C
(chap. 6.4).
Chart recorder function: meas-
ured-value memory cleared,
information lost.
New setting of storage rate.
Change the storage rate ONLY
if the previously registered data
are no longer required (chap.
7).