65
c l i m a t e m a s t e r.c o m
Tranquility
®
22 Digital (TZ
)
Series - 60Hz
R e v. : N o v e m b e r 1 8 , 2 0 2 2
Performance Troubleshooting
Symptom
Htg Clg Possible Cause
Solution
Insufficient Capacity/
Not Cooling or Heating
Properly
X
X
Dirty filter
Replace or clean.
X
Reduced or no airflow
in heating
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.
X
Reduced or no airflow
in cooling
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.
X
X
Leaky duct work
Check supply and return air temperatures at the unit and at distant duct
registers. If significantly 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 cooling 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 backfill, ground moisture.
High Head Pressure
X
Reduced or no airflow
in heating
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.
X
Reduced or no water flow
in cooling
Check pump operation or valve operation/setting.
Check water flow. Adjust to proper flow rate.
X
Inlet water too hot
Check load, loop sizing, loop backfill, 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 flow in heating
Check pump operation or water valve operation/setting.
Plugged strainer or filter? Clean or replace.
Check water flow. Adjust to proper flow rate.
X
Water temperature out of range Bring water temperature within design parameters.
X
Reduced airflow in cooling
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.
X
Air temperature out of range
Too much cold vent air? Bring entering air temperature within
design parameters.
X
X
Insufficient charge
Check for refrigerant leaks.
Low Discharge Air
Temperature in Heating
X
Too high of airflow
Check fan motor speed selection and airflow chart.
X
Poor performance
See ‘Insufficient Capacity’.
High humidity
X
Too high of airflow
Check fan motor speed selection and airflow chart.
X
Unit oversized
Recheck loads & sizing. Check sensible cooling load and heat
pump capacity.
Table continued on next page.
