Spectron FS4, User Manual

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Spectron Gas Control Systems GmbH Repair | 9
GES_FS4_0520 47
– 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 " Commission-
ing [ } 20] ").
9.2 Troubleshooting and fault rectification
Fault Possible cause Remedy
Controller not functioning Fuse faulty
Power supply unit faulty
Mains power supply interrup-
ted
Replace fuse
Replace power supply unit
Check and ensure power sup-
ply
No analogue signal Fuse faulty
Loose contact on terminal
Replace fuse
Check terminal assembly
Pneumatic valve not switching Loose contact on terminal
Pneumatic valve faulty
Check terminal assembly
Replace pneumatic valve
Pneumatic valve leaking Line faulty
Valve seal faulty
Seal leaking on screw connec-
tion
Replace line
Replace valve
Replace seal
Display not functioning Fuse faulty
Supply voltage to the display
interrupted
Display faulty
Replace fuse
Check electrical connection of
the display
Replace display
Communication fault on dis-
play Loose contact on data cable
Controller fixed
Check data cable connections
Switch the controller off and
back on, replace if necessary