Actuators; Hi-Limit Switch - Pitco SELVRF Trouble-Shooting And Service Manual

BEFORE SERVICING, REFER TO PAGE 3 AND 4 OF THIS DOCUMENT FOR IMPORTANT NOTICES
COMPONENT TROUBLESHOOTING (CONTINUED)
When changing actuators, make sure the valve is in a closed position before installing the new actuator. All replacement
actuators are shipped in a closed position.
Return/Divert/Waste/Smart Oil Sensor Actuators:
To check the operation of the return, divert, waste oil or smart oil sensor actuator:
1. Turn the controller off.
2. Open the door and locate the actuator you want to troubleshoot.
3. Follow the cord from the actuator to the control box mounted on the right side of the appliance.
4. Using a multimeter set to DC voltage, insert your meter's positive wire lead into the red wire connection and negative
wire lead into the black wire connection.
5. Any time the actuator valve is closed or is closing, the actuator will receive positive 24VDC.
6. Any time the actuator valve is open or is opening, the actuator will receive negative 24VDC.
7. If the actuator is not moving when the polarity switches, the actuator has failed.
8. If the polarity does not change when it should, you may have a failed relay board. Refer to relay board filter circuits
troubleshooting on the next page.
Drain Actuator:
To check the operation of the drain actuator: DRAIN THE TANK OF ALL LIQUIDS OR MAKE SURE THE FILTER PAN IS IN PLACE AND
EMPTY BEFORE TESTING THE DRAIN VALVE
1. Turn the controller off.
2. Open the door and locate the drain actuator on the underside of the drain valve.
3. Follow the cord from the actuator to the control box mounted on the right side of the appliance.
4. Using a multimeter set to DC voltage, insert your meter's positive wire lead into the red wire connection and negative
wire lead into the black wire connection.
5. Any time the actuator valve is closed or is closing, the actuator will receive a positive 24VDC.

On the controller, press and hold the filter key until "
"
the drain valve. The meter display will change to negative 24VDC. Press the "6" key again to turn off the drain
actuator relay and close the drain valve.
7. If the actuator is not moving when the polarity switches, press the white reset button on the right side of the
actuator. If the actuator still will not move, the actuator has failed.
8. If the polarity does not change when you press the "6" key, you may have a failed relay board. Refer to relay board
filter circuits troubleshooting on the next page.
9. Additionally you need to check signal output from the actuator to indicate if the internal switch is functioning. To test
the internal switch:
a. When the actuator is closed, use a multimeter set to continuity and check blue to white for a closed circuit.
b. When the actuator is open, use a multimeter set to continuity and check blue to white for a open circuit.
Hi Limit:
The hi limit is a normally closed switch designed to open at 450°F (232°C) +/- 15°F (+/- 8.3°C). If the hi limit is opening prematurely,
verify the hi-limit switch sensing bulb and capillary tube inside the vat is not touching the elements. No more than 6" of capillary
tube should be inside the tank.
To verify the hi-limit switch is closed, shut off the appliance, remove the hi-limit switch from its bracket, remove the two wires
from the hi-limit switch and use a multimeter to check for continuity through the hi-limit switch.
L22-405 RO
" will be displayed. At this point, pressing the "6" key will turn on the drain relay and open
" is displayed. Then press the "1" key and
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