Edwards IH Instruction Manual - Ideal Vacuum Products
Edwards IH Instruction Manual - Ideal Vacuum Products
Edwards IH Instruction Manual - Ideal Vacuum Products
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6.18.1 Introduction<br />
Perform the following checks when you maintain your pumping system:<br />
• Check that the disconnect box is securely fitted on the wall.<br />
• Check that all electrical connections are secure and that electrical cables are not damaged.<br />
The disconnect box and photohelic switch/gauge contains no serviceable parts. Repair of<br />
faults by the user is limited to replacement of fuses, and resetting of the circuit breakers.<br />
If any other repairs are required, contact your supplier or your nearest BOC <strong>Edwards</strong> Service<br />
Centre for advice.<br />
6.18.2Fault finding<br />
If you suspect that a fault exists in the disconnect box, check the possible causes and carry out<br />
the remedial actions described in the following table before returning the disconnect box to a<br />
Service Centre.<br />
Symptom Probable Cause Recommendations<br />
The disconnect box will<br />
not power up<br />
A fuse has blown<br />
Check fuses F1 through F6<br />
and replace if required<br />
Incoming electrical supply has<br />
failed<br />
Check the electrical supply<br />
Photohelic gauge in warning state<br />
Rectify situation and reset CB1<br />
Brownout condition over 3 seconds Rectify situation and restart<br />
system<br />
Photohelic gauge will<br />
not operate<br />
Circuit breaker CB1 tripped<br />
Rectify situation and reset CB1<br />
6.18.3 Fuse replacement<br />
The fuses are mounted in standard fuse holders. The use of a fuse puller is recommended<br />
when checking or replacing blown fuses.<br />
If fuses blow regularly, this indicates a probable fault in the disconnect box or electrical<br />
connections. Isolate and rectify the fault before reusing the disconnect box.<br />
6-20 iH Dry Pumping Systems