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C l i m a t e M a s t e r W a t e r- S o u r c e H e a t P u m p s
C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tranquility
®
Compact (TC) Series
R e v. : 0 2 / 0 4 / 1 3
Performance Troubleshooting
Performance Troubleshooting
Htg Clg Possible Cause
Solution
Insuf
fi
cient capacity/ Not
cooling or heating
X
X
Dirty
fi
lter
Replace or clean.
X
Reduced or no air
fl
ow in heating
Check for dirty air
fi
lter and clean or replace.
Check fan motor operation and air
fl
ow restrictions.
Too high of external static. Check static vs. blower table.
X
Reduced or no air
fl
ow in cooling
Check for dirty air
fi
lter and clean or replace.
Check fan motor operation and air
fl
ow restrictions.
Too high of external static. Check static vs. blower table.
X
X
Leaky duct work
Check supply and return air temperatures at the unit and at distant duct registers
if signi
fi
cantly different, duct leaks are present.
X
X
Low refrigerant charge
Check superheat and subcooling per chart.
X
X
Restricted metering device
Check superheat and subcooling per chart. Replace.
X
Defective reversing valve
Perform RV touch test.
X
X
Thermostat improperly located
Check location and for air drafts behind stat.
X
X
Unit undersized
Recheck loads & sizing. Check sensible clg. load and heat pump capacity.
X
X
Scaling in water heat exchanger
Perform scaling check and clean if necessary.
X
X
Inlet water too hot or too cold
Check load, loop sizing, loop back
fi
ll, ground moisture.
High Head Pressure
X
Reduced or no air
fl
ow in heating
Check for dirty air
fi
lter and clean or replace.
Check fan motor operation and air
fl
ow restrictions.
Too high of external static. Check static vs. blower table.
X
Reduced or no water
fl
ow in cooling
Check pump operation or valve operation/setting.
Check water
fl
ow. Adjust to proper
fl
ow rate.
X
Inlet water too hot
Check load, loop sizing, loop back
fi
ll, ground moisture.
X
Air temperature out of range in heating
Bring return air temperature within design parameters.
X
Scaling in water heat exchanger
Perform scaling check and clean if necessary.
X
X
Unit overcharged
Check superheat and subcooling. Re-weigh in charge.
X
X
Non-condensables in system
Vacuum system and re-weigh in charge.
X
X
Restricted metering device.
Check superheat and subcooling per chart. Replace.
Low Suction Pressure
X
Reduced water
fl
ow in heating.
Check pump operation or water valve operation/setting.
Plugged strainer or
fi
lter. Clean or replace.
Check water
fl
ow. Adjust to proper
fl
ow rate.
X
Water temperature out of range.
Bring water temperature within design parameters.
X
Reduced air
fl
ow in cooling.
Check for dirty air
fi
lter and clean or replace.
Check fan motor operation and air
fl
ow restrictions.
Too high of external static. Check static vs. blower table.
X
Air temperature out of range
Too much cold vent air? Bring entering air temperature within design parameters.
X
X
Insuf
fi
cient charge
Check for refrigerant leaks.
Low Discharge Air Temperature
in Heating
X
Too high of air
fl
ow
Check fan motor speed selection and air
fl
ow chart.
X
Poor performance
See ‘Insuf
fi
cient Capacity’
High humidity
X
Too high of air
fl
ow
Check fan motor speed selection and air
fl
ow chart.
X
Unit oversized
Recheck loads & sizing. Check sensible clg load and heat pump capacity.