Service Analyzer Charts - Rheem RA17 Series Installation Instructions Manual

DIAGNOSTICS

Service Analyzer Charts

COMPRESSOR OVERHEATING
SYMPTOM
High superheat Low charge
(greater than 15°F
[- ] at coil Verify suction thermister operation
Verify pressure transducer operation input
and output voltage
Faulty metering device (EEV)
High internal load
Restriction in liquid line
Low head pressure
Suction or liquid line subjected to high heat
source
Low line voltage Loose wire connections
Power company problem, transformer
Undersized wire feeding unit
High line voltage Power company problem
High head Overcharge
pressure
Dirty outdoor coil
Faulty or wrong size outdoor fan motor
Faulty fan blade or wrong rotation
Recirculation of air
Additional heat source
Noncondensibles
Equipment not matched
Short cycling of com- Faulty pressure control
pressor
Loose wiring
Thermostat
EEV
48
POSSIBLE CAUSE
Check system charge.
Replace thermistor
Replace transducer and/or harness and/or control board
oreign matter stopping ow. lean
nitrogen.
Hot air (attic) entering return
eat source on miswired or faulty control
Drier plugged.
Line kinked.
Low charge
Operating in low ambient temperatures
Hot attic / insulate liquid line
Hot water line
Check wiring.
Have problem corrected before diagnosis continues.
Correct and complete diagnosis.
Have problem corrected.
Check system charge.
Clean coil.
Replace fan motor.
Replace fan blade.
Replace with correct rotation motor.
Correct installation.
Check for dryer vent near unit.
Check for recirculation from other equipment.
Recover refrigerant. Evacuate and recharge system.
Correct mismatch.
Replace pressure control.
Check unit wiring.
Located in supply air stream
Di erential setting too close
Customer misuse
Internal foreign matter. Clean with nitrogen
Pressure transducer failure
Suction thermistor failure
EEV control failure
EEV coil failure
Distributor tube/tubes restricted
inside with