53
Diagnostics
DIAGNOSTICS
COOLING MODE
TROUBLESHOOTING TIPS
SYSTEM
PROBLEM
INDICATORS
DISCHARGE
PRESSURE
SUCTION
PRESSURE
SUPERHEAT
.ORMAL n &
; n #=
SUBCOOLING
.ORMAL3EE
Charging Chart
COMPRESSOR
AMPS
Overcharge
High
High
Low
High
High
Undercharge
Low
Low
High
Low
Low
Liquid Restriction
(Drier)
Low
Low
High
High
Low
Low Indoor Airflow
Low
Low
Low
Low
Low
Dirty Outdoor Coil
High
High
Low
Low
High
Low Outdoor
Ambient Temperature
Low
Low
High
High
Low
Inefficient
Compressor
Low
High
High
High
Low
Indoor EEV Feeler
Bulb Charge Lost
Low
Low
High
High
Low
Poorly Insulated
Indoor Sensing Bulb
High
High
Low
Low
High
ELECTRONIC EXPANSION VALVES (cont.)
SYMPTOM
POSSIBLE CAUSE
REMEDY
Superheat and
suction pressure
uctuate valve is
hunting)
Oversized EEV
Install correct EEV
Unequal refrigerant ow through evaporator
circuit
Ensure suction line thermistor is in correct location in a
clean section of copper pipe.
Moisture freezing and partially blocking EEV
ecover refrigerant, change lter-drier, evacuate system,
and recharge.
Valve does not
regulate at all
External equalizer liine not connected or line
plugged
Connect equalizer line in proper location, or remove any
blockage.
Sensing bulb lost its operating charge
Replace TEV.
Valve body damaged during soldering or by
improper installation
Replace the TEV.
Service Analyzer Charts
Summary of Contents for RA17 Series
Page 16: ...16 N R Application not recommended INSTALLATION Table 2 Tubing...
Page 17: ...17 N R Application not recommended INSTALLATION Table 3 Tubing...
Page 54: ...54 R C For Single Phase Models WIRING DIAGRAMS Wiring Diagrams...
Page 55: ...55 WIRING DIAGRAMS Wiring Diagrams...
Page 56: ...56 NOTES...
