NSF AC10-PC, Руководство по обслуживанию

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38 VDC output to Solenoid
Note: Turn the power off until you are ready to check.
1. Remove the valve cover – remove the 4 Phillips screws.
2. With the Digital Multi-Meter set to DC Volts,
check for +24
Æ
+38 VDC (±) between pin 1 (+24) and
Pin 2 (SOL 1) on J2 terminal strip.
3. Press the Large size button.
4. If you are not getting the proper voltage at these test points,
replace the Circuit Board.
If you are using a digital meter, the measurement may flash
only momentarily on the display of the meter.
38 VDC output to Compressor Relay
1. Turn Power switch OFF.
2. Remove the valve cover.
3. Turn R36 Temp Adjust potentiometer to
5:00 o’clock on the Circuit Board.
4. Turn Power switch back ON.
5. Wait 2½ minutes. The compressor should start.
If not, with the Digital Multi-Meter set to DC Volts,
check for approxi38 VDC between Pin 1 (+24)
and Pin 5 (REL) on the (J2) terminal strip (red wires).
6. If voltage is okay at these points, then the Circuit Board
is okay.
If voltage is not apparent, change the Circuit Board.
See page 14, 15 for proper setup of temperature.
Do
not leave the Temp Adj at 5 o’clock – that will
freeze dairy product. See page 15.
7. Replace the valve cover.
8. Turn the Power Switch back ON.
120 VAC input to Compressor Back
Note: Turn the power off until you are ready to check.
1. Remove the back panel – remove the 9 Phillips
screws holding it in place.
2. Remove the retaining clip holding the black plastic
cover to the rear of the Compressor.
3. Remove the cover.
4. Gently pull back the connector to the Compressor
without completely removing it.
5. With the Digital Multi-Meter set to AC Volts (~),
check for 110-120 VAC ± 3 Volts on the bottom two leads.
If you don’t get this reading, check the wall outlet.
6. Replace the compressor cover.
7. Replace the back panel.