Refrigeration System Diagnosis; Compressor Winding Resistance - KitchenAid KUWS246 Technical Education

REFRIGERATION SYSTEM DIAGNOSIS GUIDE
SYSTEM SUCTION
CONDITION PRESSURE
NORMAL Normal
OVER- Higher than
CHARGE normal
UNDER- Lower than
normal
CHARGE
PARTIAL Somewhat
RE- lower than
STRICTION normal-in
vacuum
COMPLETE In deep
vacuum
RE-
STRICTION
NO GAS 0PSIG
to
25" vacuum

COMPRESSOR WINDING RESISTANCE

To measure start winding resistance, measure across the Common (C) and Start (S) pins.
To measure run winding resistance, meausre across the Common (C) and the Run (R) pins.
When measuring resistance between the Common (C), Start (S) or Run (R) pins to ground, meter
should read infinity. Any resistance indicates a shorted compressor.
Specifications:
Start Winding Resistance C to S:
Run Winding Resistance C to R:
Pin Configuation:
C = Common
R = Run
S = Start
COMP.
SUCTION
DIS-
LINE
CHARGE
Slightly
Very hot
below room
temp.
Very cold
Slightly
may frost
warm
heavily
to hot
Warm -
Hot
near room
temp.
Warm -
Very hot
near room
temp.
Room temp.
Room temp.
(cool)
(cool)
Room temp.
Cool to hot
(cool)
28 ohms
8 ohms
CON- CAPILLARY
DENSER TUBE
Very hot Warm
Warm Cool
Top pass Warm
warm
Lower pass
cool (near
room temp)
due to liquid
Room temp. Room temp.
(cool) or
colder
Room temp. Room Temp.
(cool)
Room temp. Room temp.
(cool)
C
S
Pin Configuation
8
EVAP. WATTAGE
Cold Normal
Cold Higher than
normal
Extremely Lower than
cold neat normal
inlet - Outlet
below room
temp.
Extremely Lower than
cold near normal
inlet - Outlet
below room
temp
No refrigera- Lower than
tion normal
No refrigera- Lower than
tion normal
R