Faults – WIKA AC-1 User Manual

Page 20

WIKA operating instructions pressure transmitter model AC-1

14026285.01 11/2012 GB/D/F/E

7. Maintenance and cleaning / 8. Faults

7. Maintenance and cleaning

7.1 Maintenance

This pressure transmitter is maintenance-free.

Repairs must only be carried out by the manufacturer.

7.2 Cleaning

CAUTION!

■

Before cleaning, correctly disconnect the pressure transmitter from the pressure supply,

switch it off and disconnect it from the voltage supply.

■

Clean the instrument with a moist cloth.

■

Wash or clean the dismounted instrument before returning it in order to protect person-

nel and the environment from exposure to residual media.

■

Residual media in dismounted instruments can result in a risk to persons, the

environment and equipment. Take sufficient precautionary measures.

For information on returning the instrument see chapter 9.2 "Return".

8. Faults

In the event of any faults, first check whether the pressure transmitter is mounted correctly, mechanically

and electrically.

Faults

Causes

Measures

Constant output signal upon

change in pressure

Mechanical overload caused by

overpressure

Wrong power supply

Replace instrument; if it fails repeatedly,

contact the manufacturer

No/wrong output signal

Wiring error

Observe the pin assignment