Vulcan-Hart 136647, Service Manual

GRA SERIES GAS FRYERS - TROUBLESHOOTING

KLEENSCREEN FILTERING

SYSTEM

SYMPTOM

POSSIBLE CAUSES

Shortening not filtering, pump motor is
energized.

1. Filter screen plugged.
2. Clog in filter system lines.

NOTE: 

If using solid shortening, when all filtered shortening

is returned to the fry tank and filter power switch is off, open
the filter drawer approximately one inch. Allow the remaining
shortening in the line to drain into the filter tank to prevent
possible clogging after the shortening cools and solidifies.
Close the filter drawer when complete.
3. Shortening below 300°F to thick.
4. R2 fill relay N.C. contacts are open.
5. Fill solenoid valve malfunction.
6. Interconnecting wiring malfunction.
7. Pump is inoperative.

Shortening not discarding, pump motor
energized.

1. Filter screen plugged.
2. Clog in filter system lines.

NOTE: 

If using solid shortening, when all filtered shortening

is returned to the fry tank and filter power switch is off, open
the filter drawer approximately one inch. Allow the remaining
shortening in the line to drain into the filter tank to prevent
possible clogging after the shortening cools and solidifies.
Close the filter drawer when complete.
3. Shortening below 300°F to thick.
4. Discard valve switch malfunction (N.O. contacts not

closing to energize R2 fill relay coil).

5. R2 fill relay malfunction (contacts remain closed).

NOTE:

 The fill solenoid valve should not be energized

during discard operation so that shortening will flow thru
manual discard valve only.
6. Discard valve mechanical malfunction.
7. Discard hose connection not fully engaged.
8. Pump is inoperative.

Pump motor is not energized to circulate
shortening thru filtering system.

1. Filter switch on cooking controls not turned on.
2. Pump needs reset. (Reset button located on pump)
3. R1 pump motor relay malfunction.
4. Cooking control malfunction.
5. Interconnecting wiring malfunction.
6. Pump motor inoperative.

Pump motor is not energized to discard
shortening.

1. Filter switch on cooking controls not turned on.
2. Pump needs reset. (Reset button located on pump)
3. Discard handle (yellow) not extended.
4. R1 pump motor relay malfunction.
5. Cooking control malfunction.
6. Interconnecting wiring malfunction.
7. Pump motor inoperative.

F25377 (March 2010)

Printed in U.S.A.