Owner`s manual

16
630460082
C. Voltage – The voltage should be within 10% of the rated nameplate voltage.
D. High compressor amperage draw, it should never exceed 120% of the rated nameplate amperage.
See Electrical Checkout Instructions.
3. THE COMPRESSOR RUNS BUT WILL NOT REFRIGERATE
A. Check the compressor suction and discharge pressures. See TEMPERATURE/PRESSURE CHART.
ELECTRICAL CHECKOUT
FIGURE 9. ELECTRICAL BOX
1. Be sure the unit is disconnected from the power source. Remove the compressor electrical box cover.
Check for obvious damage and loose wires.
2. Disconnect the fan motor leads. Since capacitors store energy, short the capacitor with a screwdriver. This
will prevent shocks.
3. Disconnect the compressor terminal wires.
OVERLOAD CHECK
(See Figure 4)
4. Using a volt–ohm meter check the continuity across the overload, contacts #1 & #3. If none, wait for unit to
cool down and try again. If still no continuity, the overload protector is defective and should be replaced.
COMPRESSOR CHECK
(See Figure 9)
The resistance readings on the windings will be between 0.25 and 10.00 ohms, a meter capable of these low
readings must be used.
5. Check between ”C” & ”R.” Replace compressor if there is no continuity as the run windings are open.
6. Check between ”C” & ”S.” Replace the compressor if there is no continuity as the start windings are open.
7. Check between ”C” & ”R”, or ”S” and shell of the compressor. If there is continuity re-
place the compressor as the motor is grounded.
8. Check between screw terminal on the overload and ”C” on the compressor. Check and repair the lead or
connections if there is no continuity.
CAPACITOR CHECK
9. Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.