Daikin VRV X Series High-COP Type Air Conditioner RXQ38AHR

Warning: This test operation requires trained personnel with PPE!

INFORMATION: It may take 10 minutes to achieve a uniform refrigerant state before the compressor starts.

During the test operation, the refrigerant running sound or the magnetic sound of a solenoid valve may become loud and the display indication may change. These are not malfunctions.

Power to the outdoor unit and the connected indoor units is ON

NOTICE: Be sure to turn on the power 6 hours before operation in order to protect the compressor

Default (idle) situation is existing

Push BS2 for 5 seconds or more. The unit will start test operation.

Is the temperature setting of the remote controller at the lowest level in cooling mode or in test mode?

Is the air from indoor unit cool?

Is the air from outdoor unit warm?

Is the air flow from the indoor unit stopped occasionally during operation?

Resistance between phases of U, V, W at the motor side connectors

Values are balanced and there is no short circuiting

X1A connector removed from the fan PCB (A2P)

Resistance between the U and V, V and W, and W and U phases of the motor connector

Each phase are balanced (within a permissible dispersion range of ±20%)

Fan Motor Connector Check (Signal Cable): CHECK 17 Resistance measuring points and judgment criteria.

CHECK 4: Perform the following procedures prior to check.

All wiring removed from the PCB where power transistors are mounted on

Point of Measurement and Judgment Criteria

10 minutes or more passed since power supply turned OFF

Measurement mode for analog multimeter

Warning: This check requires trained personnel with PPE!

Enter the high pressure reading

Is overload control conducted causing insufficient cooling capacity?

Enter the superheating degree of suction gas

Is the compressor lower in discharge pipe temperature despite of pressure loads?

Enter the subcooling degree of condensate

Is the subcooling degree of condensate high?

Sign off on the refrigerant overcharge check