Pitco SELVRF - Actuator Troubleshooting; Hi Limit Switch Troubleshooting

BEFORE SERVICING, REFER TO PAGE 3 AND 4 OF THIS DOCUMENT FOR IMPORTANT NOTICES
L22-405 RO 14
COMPONENT TROUBLESHOOTING (CONTINUED)
When changing actuators, make sure the valve is in a closed posion before installing the new actuator. All replacement
actuators are shipped in a closed posion.
Return/Divert/Waste/Smart Oil Sensor Actuators:
To check the operaon of the return, divert, waste oil or smart oil sensor actuator:
1. Turn the controller o.
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 mulmeter set to DC voltage, insert your meter’s posive wire lead into the red wire connecon and negave
wire lead into the black wire connecon.
5. Any me the actuator valve is closed or is closing, the actuator will receive posive 24VDC.
6. Any me the actuator valve is open or is opening, the actuator will receive negave 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 lter circuits
troubleshoong on the next page.
Drain Actuator:
To check the operaon 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 o.
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 mulmeter set to DC voltage, insert your meter’s posive wire lead into the red wire connecon and negave
wire lead into the black wire connecon.
5. Any me the actuator valve is closed or is closing, the actuator will receive a posive 24VDC.
 On the controller, press and hold the lter key unl “ ” is displayed. Then press the “1” key and
“ ” will be displayed. At this point, pressing the “6” key will turn on the drain relay and open
the drain valve. The meter display will change to negave 24VDC. Press the “6” key again to turn o the drain
actuator relay and close the drain valve.
7. If the actuator is not moving when the polarity switches, press the white reset buon on the right side of the
actuator. If the actuator sll 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
lter circuits troubleshoong on the next page.
9. Addionally you need to check signal output from the actuator to indicate if the internal switch is funconing. To test
the internal switch:
a. When the actuator is closed, use a mulmeter set to connuity and check blue to white for a closed circuit.
b. When the actuator is open, use a mulmeter set to connuity 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 o the appliance, remove the hi-limit switch from its bracket, remove the two wires
from the hi-limit switch and use a mulmeter to check for connuity through the hi-limit switch.