Comfort Star Outdoor Unit CIP18CD(O)

WARNING: Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury.

Temperature sensor disconnected from PCB

Upload a picture of the multi-meter reading

Check corresponding temperature sensor resistance value table

Note any discrepancies or issues found

Sign off on the temperature sensor check

Slightly connect the Handle Lo charge hose to the 3-way service port

Connect the charge hose to the valve at the bottom of the cylinder

Select the type of refrigerant used

Invert the cylinder for a complete liquid charge

Open the valve at the bottom of the cylinder for 5 seconds to purge the air in the charge hose

Fully tighten the charge hose with push pin Handle Lo to the service port of 3-way valve

Record the starting weight of the charging cylinder

Fully open the Handle Lo manifold valve, 2- and 3-way valves

WARNING: Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting.

Outdoor unit turned off and power supply disconnected

Electrolytic capacitors discharged and all energy-storage unit has been discharged

Outdoor PCB or IPM board disassembled

Resistance value between P and U

Resistance value between P and V

Resistance value between P and W

Resistance value between P and N

Resistance value between U and N

Warning: This procedure requires trained personnel with PPE!

Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves are closed.

Connect the charge hose with the push pin of Handle Lo to the gas service port of the 3-way valve.

Connect another charge hose to the vacuum pump.

Fully open the Handle Lo manifold valve.

Using the vacuum pump, evacuate the system for 30 minutes.

Check whether the compound meter indicates -0.1 MPa (14.5 Psi).

If the meter does not indicate -0.1 MPa (14.5 Psi) after 30 minutes, continue evacuating for an additional 20 minutes.

If the pressure does not achieve -0.1 MPa (14.5 Psi) after 50 minutes, check for leakage.

Warning: This procedure requires trained personnel with PPE!

Compressor power cord disconnected from outdoor PCB

Resistance value of each winding

Check the resistance value of each winding in the following table.

Upload a photo of the multi-meter reading

Sign off on the compressor check