Pitco SELVRF, Руководство по устранению неисправностей и обслуживанию

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BEFORE SERVICING, REFER TO PAGE 3 AND 4 OF THIS DOCUMENT FOR IMPORTANT NOTICES
13 L22 - 405
COMPONENT TROUBLESHOOTING (CONTINUED)
DC Power Supply:
The DC power supply has a built in overload protection circuit. If a short or over amp condition is detected, the DC power supply will
stop outputting DC power until the short or over amp condition is resolved. To verify operation of the DC power supply:
1. Turn the appliance off. Verify the AC and DC fuses are good.
2. Open the front panel and locate the DC power supply. On dual units, this is located on the right side unit.
3. Check the output of the controller for DC voltage with a multimeter set to DC. Acceptable reading is 23.5VDC - 24.5VDC.
Element (HTR1, HTR2 on Schematic):
To check the operation of each section of the element:
1. Turn the controller off. Disconnect the electrical supply.
2. Open the door and remove the entrance box covers.
3. Note the location of the element wires on the contactors and then remove the element wires from the contactors.
4. Using a multimeter set to ohms, check the following wires for resistance on each element. Acceptable reading is 14 Ω -
15Ω.
a. Wire 1 to wire 4
b. Wire 2 to wire 5
c. Wire 3 to wire 6
5. Reconnect the element wires to the contactors.
6. Reconnect the electrical supply. Turn the appliance on and allow to start heating.
7. Using a clamp meter, check the amp draw on each leg of the incoming power. Each leg should read close to the amp
rating on the rating plate attached to the door.
8. Turn the appliance off and disconnect the electrical supply.
9. Reassemble the entrance box covers. Reconnect the electrical supply and verify operation.
Safety (Side On) Contactor (K10 on Schematic):
To check the operation of the safety (side on) contactor:
1. Turn the controller off. Disconnect the electrical supply.
2. Open the door and remove the entrance box covers.
3. Note the location of the contactor coil wires and the remove the wires from the contactor coil.
4. Using a multimeter set to ohms, check the resistance between the contactor coil contacts. Acceptable reading is 6 Ω -
7Ω.
5. Reconnect the contactor coil wires. Then reconnect the electrical supply.
6. Turn the controller on and check for voltage across the contactor coil contacts. A steady 24VAC - 28VAC should be
present and the contactor should be pulled in.
7. Turn the controller off and disconnect the electrical supply.
8. Reassemble the entrance box covers. Reconnect the electrical supply and verify operation.
Cycling (Heat Demand) Contactor (K11 on Schematic):
To check the operation of the cycling (heat demand) contactor:
1. Turn the controller off. Disconnect the electrical supply.
2. Open the door and remove the entrance box covers.
3. Note the location of the contactor coil wires and the remove the wires from the contactor coil.
4. Using a multimeter set to ohms, check the resistance between the contactor coil contacts. Acceptable reading is 3 Ω -
4Ω.
5. Reconnect the contactor coil wires. Then reconnect the electrical supply.
6. Turn the controller on and check for voltage across the contactor coil contacts. A steady 24VAC - 28VAC should be
present and the contactor should be pulled in when the controller is calling for heat.
7. Turn the controller off and disconnect the electrical supply.
8. Reassemble the entrance box covers. Reconnect the electrical supply and verify operation.