Pentair t29 - TROUBLE SHOOTING; BASIC AIR CONDITIONING TROUBLE SHOOTING CHECK LIST

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TROUBLE SHOOTING
BASIC AIR CONDITIONING TROUBLE SHOOTING CHECK LIST
1. Check manufacturer’s nameplate located on the unit for correct power supply.
2. Turn the power to the unit on. The evaporator (Enclosure or “COLD” air) blower should come on. Is
there airflow?
YES, proceed to step 3.
NO, possible problem:
• Open motor winding
• Stuck blower motor
• Obstructed wheel
Repair or Replace
defective part
3. Check thermostat setting and adjust thermostat to the lowest setting. If set point is below the
enclosure temperature, the condenser blower and the compressor should turn on. Note: It could
take up to 5 minutes for the blower to come on after the compressor starts. Did condenser blower
and compressor come on when the thermostat was turned on?
YES, proceed to step 4.
NO, possible problem:
• Defective thermostat
• Cabinet temperature is cooler than
thermostat set point
Replace Part
4. Are both blowers and the compressor running? If not the unit will not cool properly.
5. Check condenser (Ambient or “HOT” air) blower for airflow. Is there airflow?
YES, proceed to step 6.
NO, possible problem:
• Defective thermostat
• Open motor winding
• Stuck blower motor
• Obstructed wheel
• Defective Head Pressure Control
valve
Repair or Replace
defective part
6. Carefully check the compressor for operation - motor should cause slight vibration, and the outer
case of the compressor should be warm.
YES, wait 5 minutes, then proceed to step 7.
NO, possible problem:
• Defective thermostat
• Defective capacitor
• Defective overload
• Defective relay
Repair or Replace
defective part