Greenheck Waterwash (458292) - Manual (Page 46)

46 April 2005
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Waterwash System
Hood not clean enough
If the hood does not seem to be adequately cleaned, look for the following:
• Water supply — Is it turned on?
• Nozzles — Are any of them clogged? If so, they can be removed and cleared using a
small wire.
• Detergent tank — Is it empty, or filled with the wrong detergent?
• Water pressure — Is it above the minimum 40 PSI?
• Water temperature — Is it above the 140°F minimum?
• Detergent pump — Is the mix ratio too low for the type of accumulations on the hood?
• Length of Wash Cycle can be increased. (Consult Factory).
Hot water running, system not in wash cycle
If there is water running through the system when the hood is not in a cleaning cycle, the sys-
tem may be in fire mode. (Fire mode indicator light will be lit.) Check to ensure that the water
wash system is wired to the fire system microswitch and that there is a jumper between
terminal s 5 & 6 on the PLC.
Hot water running continuously after wash cycle, detergent pump not running
If water is spraying, but the detergent pump is not running (and fire mode and wash indicator
lights are off) the solenoid valve may be stuck in the open position. To correct:
• Gently tap the valve housing to release any foreign material trapped in the valve.
• If this does not correct the problem, it is necessary to remove the valve coil and stem.
CAUTION: Turn off electrical power before disassembling valve. Clean valve coil and stem,
and re-install very carefully to avoid damaging the plunger.
• Check valve diaphragm for failure. If it has failed, rebuild it. Kits of various sizes are
available. See the Waterwash Start-up Checklist on page 52.
• If solenoid sticks regularly, foreign material getting past the building's line strainer is the
most likely cause. Remove and clean the strainer, or install an additional strainer in line
before the waterwash cabinet.
Wash i ndicator light on, no hot water running
If the Wash Cycle indicator light is lit, but water is not spraying, look for the following:
• Shut off valve — This valve, located inside the control station, must be in the open
position.
• Water Solenoid valve
- Check to be sure that water solenoid valve is getting power at the terminal strip.
- Check electrical continuity to determine if coil has burned out.
- Gently tap the valve housing to release any foreign material trapped in the valve.
• If the above steps do not correct the problem, it is necessary to remove the valve coil
and stem.
CAUTION: Turn off electrical power before disassembling valve.
Clean valve coil and stem, and re-install very carefully to avoid damaging the plunger.
If after checking all components, the problem continues, check the wiring circuit.
See wiring diagram.
Water leaks
• Check all pipe fittings.
• Ductwork may not be liquid tight as required.
• Are the access panels fitting snugly together? Fingers and clips may need to be adjusted.
• Are the fans running during the wash cycle? Fan should be off during wash. Ensure that power
to the fan is running through terminals 3 & 4 on the waterwash control panel.
• Is the water pressure too high? Turn the pressure down to 40 psi.