Component Testing - Jenn-Air Service Manual

Component Testing

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
Component Description
Variable Capacity When compressor electrical circuit is
Compressor energized the DC powered compressor
is started at high speed or 4500 RPM
down to 1600 RPM. For low speed from
the compressor PCB board.
16021730 Rev. 0
!
WARNING
Test Procedures
Resistance test
1. Disconnect power to unit.
2. Remove leads from compressor terminals.
3. Set ohmmeter to lowest scale.
4. Check for resistance between any two terminals. Resistance should be equal
between any two terminals.
5. If either compressor winding reads open (infinite or very high resistance) or
dead short (0 ohms), replace compressor.
Ground test
1. Disconnect power to refrigerator.
2. Remove compressor leads and use an ohmmeter set on highest scale.
3. Touch one lead to compressor body (clean point of contact) and other probe
to each compressor terminal.
• If reading is obtained, compressor is grounded and must be replaced.
Operation test
If voltage and motor winding tests do not show cause for failure, perform the
following test:
1. Activate the Diagnostic test mode (See Diagnostic test mode section)
2. Activate Test mode #16 (which is High Speed for compressor)
3. Check the A/C voltage between pins 1 and 2 of JP10 (Voltage should be
approximately 2.3VAC)
4. Verify that line voltage is available to Compressor PCB at CNO1 between
pins 2 and 5 If AC voltage is there.
5. Check voltage at CNO5 at pins 1 and 6 voltage should read approximately
230VAC
6. Check Voltage at CNO5 at pins 1 and 3 voltage should read approximately
230VAC
7. Check Voltage at CNO5 at pins 3 and 6 voltage should read approximately
230VAC
8. The readings at all three above readings should be the same if not bad
PCB board
9. If voltage is the same suspect a failed compressor.
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