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Diagnosing Sealed System, VR Workflow, Appliance - Coggle Diagram
Diagnosing Sealed System
Fridge too warm
Before Cutting
Check power
Amp draw, restart, amp draw again
Multimeter check outlet (110v)
Feel lines
Check Lights on when inside
causes excessive heats
Check Air Circulation
Fans operative?
Vents Blocked?
Condenser Dirty?
Defrost System functioning?
Check Electric Draw
Normal amps?
High or low?
CUT!
Check gaskets
imperfections
leaks
After Cutting - Ambient 70F
Leaks
Low side leak
Readings
high reading (175) high side
high amps (1.8)
low reading (-20) low side
Evaporator partially frosted
hissing/gurgling from evaporator
condenser will feel slightly cooler
Look for
joints with cracks
oil residue around joints
High side leaks
Readings
low (-20) lowside
low (75) high side
low amps (0.7)
evaporator partially frosted or not at all
condensor slightly cooler
compressor will run cool and quiet
CHECK SERVICE DATE
Short charge looks similar
May not have leak
If holds vacuum, no leak
Look for
joints with cracks
oil residue around joints
High pressure allows:
Look for bubbles
Leak detector
Restrictions
Partial
Readings
high amps (1.8)
low reading (-20) low side
little high reading (145) high side
Evaporator partially frosted
hissing/gurgling from evaporator
Full
Readings
low amps (0.7)
vacuum (-30) low side
little high reading (145) high side
No frost on evaporator
Rare
Bad Compressor - heavy contamination from low side leak
Readings
high (20) low side
low (60) high side
low (0.5) amps
lack of frost
lack of hissing or gurgling at evaporator
Over-charge
Readings
high (5) low
high (160) high
high (1.3) amps
heavily frosted evaporator
frost on suction line
Short-charge
Readings
low (-20) lowside
low (75) high side
low amps (0.7)
Like high-side leak
Short charge Only if hold vacuum
Air in system
Readings
slight high (3) low
high (155) high
low (1.3) amps
some hissing and gurgle from evaporator
condensor small temp differential btween inlet and outlet
VR Workflow
Intro
Check
Appliance
conditions
manifestation of condition
identification
adress issue