General information on repair work

DANGER

Voltage

The components of the control and the connections are under voltage. There is a danger of death on contact.

1. Only allow work in which the control unit must be opened to be carried out by trained specialist personnel (electricians).
2. Only perform work in which the control unit must be opened when the power supply is switched off.
3. The five safety rules according to DIN VDE 0105 are to be observed:
4. Disconnect from the mains
5. Secure against reconnection
6. Verify that the system is dead
7. Carry out earthing and short circuiting
8. Provide protection from adjacent live parts

WARNING

Noise emission

When working on pressurised pneumatic supply, significant noise emission can occur. Acute and chronic loss of hearing may result.

1. Never perform work on the pressurised pneumatic supply without hearing protection.
2. Only replace the silencers when the supply is unpressurised.

WARNING

Displacement of atmospheric oxygen

In the event of inert gas leaks, displacement of atmospheric oxygen may occur. Danger of suffocation!

1. The operator must ensure adequate ventilation and airing in all rooms with gas installations and monitor the oxygen content.

The objectives of the repair are:

• Detect and assess causes of malfunction
• Rectify faults and restore operational readiness

Repairs to the controller may only be performed by the manufacturer or specialist personnel (electrical engineers) instructed on the system.  

Before beginning maintenance work, the controller must be enabled and secured against reconnection. Observe the five safety rules according to DIN VDE 0105:

• Disconnect from the mains
• Secure against reconnection
• Verify that the system is dead
• Carry out earthing and short circuiting
• Provide protection from adjacent live parts.

After completing the works, a re-commissioning process must be carried out (see "Commissioning").