BINDER MK 53 - Manual (Page 60)

MK (E2.1) 10/2014 page 60/73
17. Troubleshooting
Fault description Possible fault cause Required measures
Heating
Chamber heating permanently,
set-point not held.
Controller defective.
Contact BINDER service. Pt 100 sensor defective.
Semiconductor relay defective.
Controller not adjusted.
Calibrate and adjust controller.
Chamber doesn’t heat up.
Heating element defective.
Contact BINDER service.
Semiconductor relay defective
Chamber doesn’t heat up when
turning on the chamber.
Safety controller responds.
Limit temperature reached.
Safety controller (chap. 11.2)
set too low.
Let the chamber cool down and hit
the RESET button of the MB1 con-
troller. If appropriate, select suitable
limit value.
Safety controller (chap. 11.2)
defective.
Contact BINDER service.
Unit permanently turned off.
Nominal temperature exceed-
ed by 20° due to unit failure.
Over temperature protective
device (class 1) responds.
Contact BINDER service.
Safety device class 2 responds Limit temperature reached.
Disconnect the chamber from the
power supply and let it cool down.
Detect cause and remove it. Hit the
RESET button of the controller.
Start up the chamber and check
control functions. If appropriate,
select suitable limit value.
Over-/under temperature safety
device class 2 (option) responds. Limit temperature reached.
Disconnect the chamber from the
power supply and let it cool down.
Detect cause and remove it. Hit
RESET button (5).
Start up the chamber and check
control functions. If appropriate,
select suitable limit value.
Refrigerating performance
No or too low refrigerating per-
formance.
Ambient temperature > 25 °C
(chap. 3.4).
Select cooler place of installation.
Compressor not turned on.
Contact BINDER service. Electro-valves defective.
No or not enough refrigerant.
Condensation
Condensation at the samples.
Heating-up phase without be-
dew protection.
Use the bedew protection (chap. 10).
Condensation or icing at the sides
of the inner chamber.
Set-point for a long time below
ambient temperature, icing in
the preheating chamber.
Defrost the unit.