ClimateMaster Tranquility TCH 024 - Performance Troubleshooting

ClimateMaster Water-Source Heat Pumps
76
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
Compact (TC) Series
Rev.: July 7, 2020
Performance Troubleshooting
Performance Troubleshooting Htg Clg Possible Cause Solution
Insufcient capacity/ Not
cooling or heating
X X Dirty lter Replace or clean.
X Reduced or no air ow in heating
Check for dirty air lter and clean or replace.
Check fan motor operation and airow restrictions.
Too high of external static. Check static vs. blower table.
X Reduced or no air ow in cooling
Check for dirty air lter and clean or replace.
Check fan motor operation and air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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ll, ground moisture.
High Head Pressure
X Reduced or no air ow in heating
Check for dirty air lter and clean or replace.
Check fan motor operation and air ow restrictions.
Too high of external static. Check static vs. blower table.
X Reduced or no water ow in cooling
Check pump operation or valve operation/setting.
Check water ow. Adjust to proper ow rate.
X Inlet water too hot Check load, loop sizing, loop back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 ow in heating.
Check pump operation or water valve operation/setting.
Plugged strainer or lter. Clean or replace.
Check water ow. Adjust to proper ow rate.
X Water temperature out of range. Bring water temperature within design parameters.
X Reduced air ow in cooling.
Check for dirty air lter and clean or replace.
Check fan motor operation and air 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cient charge Check for refrigerant leaks.
Low Discharge Air
Temperature in Heating
X Too high of air ow Check fan motor speed selection and air ow chart.
X Poor performance See ‘Insufcient Capacity’
High humidity
X Too high of air ow Check fan motor speed selection and airow chart.
X Unit oversized
Recheck loads & sizing. Check sensible clg load and heat pump
capacity.