IM 1049-9
40 www.DaikinApplied.com
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roubleshooting
Troubleshooting Refrigeration Circuit
Figure 56: Troubleshooting Refrigeration Circuit
Symptom
Head Pressure
Suction
Pressure
Compressor
Amp Draw
Super Heat
Subcooling
Air Temp
Differential
Water
(loops)
Temp
Differential
Safety Lock Out
Charge
Undercharge System
(Possible Leak)
Low
Low
Low
High
Low
Low
Low
Low Pressure
Overcharge System
High
High
High
Normal
High
Normal
Normal
High Pressure
Low
Low Air Flow Heating
High
High
High
High
Low
High
Low
High Pressure
Normal
Low Air Flow Cooling
Low
Low
Low
Low
High
High
Low
Low Temp
Normal
Low Water Flow Heating
Low
Low
Low
Low
High
Low
High
Low Temp
Normal
Normal
Low Water Flow Cooling
High
High
High
High
Low
Low
High
High Pressure
High Air Flow Heating
Low
Low
Low
Low
High
Low
Low
Low Temp
High Air Flow Cooling
Low
High
Normal
High
Low
Low
Normal
High Pressure
High Water Flow Heating
Normal
Low
Normal
High
Normal
Normal
Low
High Pressure
High Water Flow Cooling
Low
Low
Low
Low
High
Normal
Low
Low Temp
TXV Restricted
High
Low
Normal
High
High
Low
Low
Low
