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1ZSE 5492-128 en, Rev. 4

fm_00117

2 Trouble-shooting

Information plate

Connection nut

Test tap (R 1/8’’)

Valve handle

2.3 Motor-drive mechanism

2.3.1 Control system

Error condition Fault nding procedure

LOCAL operation or REMOTE

operation is not possible.

LOCAL operation is not possible when the control selec-

tor switch is in position REMOTE or ”0”, and REMOTE

operation is not possible in position LOCAL or ”0”.

The position indicator gener-

ates no signal.

1. Check that the contact plate and arm on the

multi-position switch are free from dust and oxide.

Check the contact function with the moving contact

arm in all positions.

2. Check the resilience of the moving contact in the

multi-position switch. The clearance between the nut

and the contact arm should be 0.4–1.2 mm.

For information about how to adjust the resilience,

refer to section Position Transmitter and other Posi-

tion Switches in Maintenance Guide.

High oil level alarm. 1. If there is a measuring amplier:

Measure the output signal from the measuring ampli-

er in all position. The signal shall raise linear up to the

highest position.

If no signal, check the feeding to the measuring am-

plier and to the position transmitter.

2. Check that the signal reaches the position indicator.

Fig. 5. Pressure relay.

ABB BUF 3 User Manual

Questions and Answers: