6/Troubleshooting. Ohio Medical Pediatric ISU, ISU

6/Troubleshooting

Problem

A. No gauge indication and no suction in any setting

10.

Pediatric ISU – Incorrect vacuum limit adjustment

B. Regulator module malfunction

C. No gauge indication but suction is being delivered

D. Gauge indication but no suction is being delivered

E. Suction level cannot be adjusted

11.

1.

Pediatric ISU – Bad or missing positive pressure relief valves

O-ring failure or diaphragm rupture

2.

1.

2.

3.

1.

2.

Stem screw loose

Blocked gauge pressure sensing orifice

Gauge mechanism locked by debris

Gauge mechanism damaged

Blocked fitting port

Overflow safety trap shut off

3.

4.

Blocked external filter

Blocked fitting

1. Regulator module malfunction

F. Insufficient flow through regulator

G. Inaccurate gauge reading Note: All gauge needles should return to the stop pin when no suction is being supplied

Possible Causes

1.

2.

3.

4.

5.

6.

7.

8.

9.

No supply vacuum

Kinked tube

Poor connection

Blocked wall outlet

Blocked adapter port

Blocked backplate

Loose mounting plate

Bad or missing mounting plate gasket

Regulator module malfunction

1.

Partial blockage in wall supply

2.

Partial blockage in regulator

1. Damaged gauge

Remedy

1.

2.

3.

4.

5.

6.

7.

8.

Correct supply problems

Straighten tube

Check all connections and seals

Unblock outlet

Unblock port

Clean with soap and water and a pipe cleaner

Tighten the 4 mounting screws

Replace/Install gasket

9.

10.

11.

1.

2.

1.

See “Regulator module malfunction” under Problem column in this section of the manual

Reset vacuum limit. (See

Section 7.5 Vacuum Limit -

Pediatric ISU Only)

Replace/Install positive pressure relief valves

Replace rubber components with regulator module replacement kit

Tighten stem screw

Unblock orifice

2.

Remove debris

3.

1.

2.

3.

4.

1.

2.

Replace gauge

Unblock port

Reset float/empty overflow safety trap

Replace external filter

Replace fitting

1. See “Regulator module malfunction” under Problem column in this section of the manual

Confirm wall supply open air flow meets minimum hospital requirements. Unblock if necessary

Perform the Flow Test in

Section 8 Service Checkout

Procedure of this manual.

Clear blockage if necessary

2. Replace gauge

6700-0082-000 (Rev.4) 10/2012 13

6/Troubleshooting

Problem

H. With the fitting port occluded, unable to decrease the suction level and gauge needle does not return to Zero when switched to O

(OFF)

I.

Limited suction in any setting and whistling noise from inside the regulator

J. Suction is delivered in the | (CONT) mode but the |O|O| (INTER) will not cycle

K. Pediatric ISU - Maximum vacuum not limited

L. Pediatric ISU - Limited suction in any setting and whistling noise from back of regulator

Possible Causes

1.

2.

3.

4.

1.

2.

Blocked filter and/or orifice

Damaged gauge

Blocked unilogic module filter

Regulator module malfunction

Selector switch loose or bad selector switch O-rings

Missing internal components

Remedy

1.

2.

3.

4.

Clear orifice and replace filter

Replace gauge

Replace filter

See “Regulator module malfunction” under Problem column in this section of the manual

1.

2.

Tighten selector switch and/or replace O-ring

Disassemble regulator and inspect

1.

2.

3.

4.

5.

Flow control valve blocked or turned full in

Timing valves turned fully in and/ or clogged

Unilogic module malfunction/ missing

Missing O-ring in selector switch

Blocked backplate

1.

2.

3.

4.

5.

Turn valve counter-clockwise until unit cycles and/or inspect valve seat area

Turn valve counter-clockwise until unit cycles and/or inspect

Replace filters and/or module

Install O-ring

Inspect backplate flow paths and unblock if necessary

1. Incorrect vacuum limit adjustment 1. Reset vacuum limit. See

Section 7.5 Vacuum Limit -

Pediatric ISU Only

1. Bad or missing positive pressure relief valves

1. Replace/Install positive pressure relief valves

M. Pediatric ISU - Vacuum limit does not remain constant

1. Loctite on set screw is breaking down

1. Replace 2.42 Loctite on set screw. See Section 7.5

Vacuum Limit - Pediatric ISU

Only

14 6700-0082-000 (Rev.4) 10/2012