Service manual

Ice Maker Service Manual

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

WARNING:

Disconnect power to the unit before servicing. Follow all lock out/tag out procedures established by the user. Verify all

power is off to the unit before performing any work.

Failure to comply could result in serious injury, death or damage to the equipment.

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

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

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.

1. Check between “C” & “R.” Replace compressor if there is no continuity as the run windings are open.

. Check between “C” & “S.” Replace the compressor if there is no continuity as the start windings are open.

3. Check between “C” & “R”, or “S” and shell of the compressor. If there is continuity replace the compressor as

the motor is grounded.

4. Check between screw terminal on the overload and “C” on the compressor. Check and repair the lead or con-

nections if there is no continuity.

CAPACITOR CHECK

1. Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.

2. Check or replace run capacitor (if supplied) check or shorted capacitor or either terminal grounded to case.

(See Figure 9)

(See Figure 4)