Table of Contents
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30 Digital ( TE ) Series - 60Hz
Tranquility
®
R e v . : M a r c h 2 0 , 2 0 2 3
Performance Troubleshooting
Symptom
Insufficient Capacity/
Not Cooling or Heating
Properly
High Head Pressure
Low Suction Pressure
Low Discharge Air
Temperature in Heating
High humidity
68
Htg Clg Possible Cause
X
X
Dirty filter
Reduced or no airflow
X
in heating
Reduced or no airflow
X
in cooling
X
X
Leaky duct work
X
X
Low refrigerant charge
X
Restricted metering device
X
X
Defective reversing valve
X
Thermostat improperly located
X
X
Unit undersized
X
X
Scaling in water heat exchanger Perform scaling check and clean if necessary.
X
X
X
Inlet water too hot or too cold
Reduced or no airflow
X
in heating
Reduced or no water flow
X
in cooling
X
Inlet water too hot
Air temperature out of range
X
in heating
X
Scaling in water heat exchanger Perform scaling check and clean if necessary.
X
Unit overcharged
X
X
X
Non-condensables in system
X
Restricted metering device
X
Reduced water flow in heating
X
Water temperature out of range
X
X
Reduced airflow in cooling
X
Air temperature out of range
X
X
Insufficient charge
Too high of airflow
X
X
Poor performance
X
Too high of airflow
X
Unit oversized
Table continued on next page.
G e o t h e r m a l H e a t i n g a n d C o o l i n g
Solution
Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high of external static? Check static vs blower table.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high of external static? Check static vs blower table.
Check supply and return air temperatures at the unit and at distant duct
registers. If significantly different, duct leaks are present.
Check superheat and subcooling per chart.
Check superheat and subcooling per chart. Replace.
Perform RV touch test.
Check location and for air drafts behind stat.
Recheck loads & sizing. Check sensible cooling load and heat
pump capacity.
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Check fan motor operation and air flow restrictions.
Too high of external static? Check static vs blower table.
Check pump operation or valve operation/setting.
Check water flow. Adjust to proper flow rate.
Check load, loop sizing, loop backfill, ground moisture.
Bring return air temperature within design parameters.
Check superheat and subcooling. Re-weigh in charge.
Vacuum system and re-weigh in charge.
Check superheat and subcooling per chart. Replace.
Check pump operation or water valve operation/setting.
Plugged strainer or filter? Clean or replace.
Check water flow. Adjust to proper flow rate.
Bring water temperature within design parameters.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high of external static? Check static vs blower table.
Too much cold vent air? Bring entering air temperature within
design parameters.
Check for refrigerant leaks.
Check fan motor speed selection and airflow chart.
See 'Insufficient Capacity'.
Check fan motor speed selection and airflow chart.
Recheck loads & sizing. Check sensible cooling load and heat
pump capacity.
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Table of Contents
Troubleshooting
