Binder MK 53 User Manual download pdf (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.

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