Command Aire Geothermal Heat Pump Manual
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A new message and message archive with a few repair notes Please use this site to assist you in troubleshooting most geothermal heatpumps. These guide lines should help; Although please note that I am not responsable for any damage to any equipment that you work on following these guide lines. If operational difficulties are encountered, perform the preliminary checks below before referring to the troubleshooting charts.
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Leave the date as it is. Select the.exe shortcut of the TI software. Step 5: Go on timestopper. Find driver's license number.
Because some controls are mounted internally and high voltage connections are exposed if the cabinet is opened, only a qualified technician should access them. I'll be constantly working on this site so check back. * Check the air filter. Dirty air filter or dirty coil will affect air flow and head pressures. * Check the water supply. Is there water flowing thru the heat exchanger. * Verify that the unit is receiving electrical supply power.
Command Aire Heat Pump Manual
* Verify that there is pressure in the loop. * Verify that the loop pumps are running. After completing the preliminary checks described above, inspect for other obvious problems such as leaking connections, broken or disconnected wires, etc. Be certain that the thermostat is set higher than the actual room temperature and the selector switch to heat if in heating mode, or that the thermostat is set lower than room temperature and the selector switch is on cool if air conditioning is desired. If the thermostat is programmable, make sure it has fresh batteries. All inputs are 24VAC from the thermostat and can be verified using a volt meter between C and Y, G, O, W. 24VAC will be present at the terminal.
For example, between Y and C if the thermostat is sending an input to the compressor; between G and C if the thermostat is sending an input to the blower; between O and C if the thermostat is sending an input to the reversing valve for cooling; between W and C if the thermostat is sending an input to the auxillery or emergency heat (heat strip); The compressor relay input is 24VAC and can be verified using a voltmeter. The fan signal is usually passed to an external fan relay and the input is 24VAC and can be verified using a voltmeter. Performance Troubleshooting Htg Clg Possible Cause Solution Insufficient capacity X X Dirty Filter Replace or clean Not cooling or heating properly X Reduced or no Air flow 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 Air flow 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 Unit Doesn't Operate in Cooling X X Low refrigerant charge Check superheat and subcooling per chart X X Restricted metering device Check superheat and subcooling per chart. 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 Cold Check load, loop sizing, loop backfill, ground moisture.