ESAB EPP-200 Flow Switch Change Troubleshooting instruction

Brand: ESAB

Model: EPP-200 Flow Switch Change

Type: Troubleshooting instruction

www.esabna.com

DATE: June 29, 2004 BULLETIN NO: P_04_011

TITLE/ PRODUCT NAME: EPP-200 Flow Switch Change

RATING:

X_ DIRECTIVE _ X _ ALERT

(Action is Required) (Potential Problem)

_ _ INFORMATION _

_ PRODUCT IMPROVEMENT

(Action is Optional) (Enhanced Product)

X_ General Distribution _ _ Business Confidential

(Unrestricted) (Restricted Distribution)

PRODUCT SERIES/ MODEL:

EPP-200 plasma Consoles (05580004315)

SERIAL NO:

Consoles manufactured prior to June 20, 2004 with the following serial numbers:

PORJ409004 PORJ414001 PORJ414002 PORJ416153

PORJ416154 PORJ417127 PORJ417128 PORJ418138

PORJ418139 PORJ420006 PORJ420007 PORJ421002

PORJ421003 PORJ421004 PORJ422063 PORJ422064

PORJ424001 PORJ424105 PORJ424106 PORJ424107

SUMMARY:

Initial EPP-200 power sources contained coolant flow switches with marginally high thresholds. In

rare cases, this could cause nuisance low flow errors. An upgrade has been made to lower this

threshold while still providing adequate torch protection.

OPERATIONAL IMPACT:

None expected.

PT-24 typically exhibits a coolant flow rate above the 0.5 GPM threshold and should not trip the

switch. The typical flow switch threshold is 0.25 GPM for protection of the PT-24 torch. The 0.5

GPM switch adds extra safety margin for torch protection but occasional episodes of low coolant

pressure or flow restrictions could cause nuisance errors of the EPP-200 system even though the

coolant flow is still adequate for torch protection.

ACTION:

It is highly recommended that you identify the flow switch in your EPP 200 console. There is

no action required if no nuisance coolant errors or EPP-200 shut downs have been experienced.

I f you wish to replace the flow switch, order the alternate part number and replace it using the

following procedure.

1. Turn “Off” or disconnect all power to the EPP-200 power source.

2. Remove the right side of the EPP-200 power source.

3. Identify the type of flow switch (lower middle section) in your unit by comparing it with the

photos below.

4. Disconnect the coolant hoses.

5. Disconnect the wire connectors.

6. Remove the two mounting screws.

7. Install new flow switch in reverse order

Flow Switch 0.5 GPM Switch Flow Switch 0.25 GPM Switch

PN- 952230 (switch only – no fittings) PN - 0558004798 (switch with fittings)

PN – 8950001 (switch only – no fittings)

CONTACT:

ESAB Welding & Cutting Products

Product & Service Information Group

843-664-4416 Phone

843-664-5539 FAX

ESAB EPP-200 Flow Switch Change Troubleshooting instruction

ESAB EPP-200 Flow Switch Change Troubleshooting instruction

ESAB EPP-200 Flow Switch Change Troubleshooting instruction

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