Comfort Star Indoor Unit CIP18CD(I)

Both 2- and 3-way valves closed

Handle Lo charge hose slightly connected to the 3-way service port

Charge hose connected to the valve at the bottom of the cylinder

Valve at the bottom of the cylinder opened for 5 seconds to purge the air in the charge hose

Charge hose with push pin Handle Lo fully tightened to the service port of 3-way valve

Starting weight of the charging cylinder

Handle Lo manifold valve, 2- and 3-way valves fully opened

Air conditioner operated in cooling mode to charge the system with liquid refrigerant

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 temperature sensor resistance value table

Note: The picture and the value are only for reference, actual condition and specific value may vary.

Sign off on the temperature sensor check

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!

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

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 pressure successfully reaches -0.1 MPa (14.5 Psi), fully close the Handle Lo valve, then cease vacuum pump operations.

Wait for 5 minutes then check whether the gauge needle moves after turning off the vacuum pump. If the gauge needle moves backward, check wether there is gas leakage.