Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 401

SiUS341802EC
8.
9.
10. Disconnect power. Disconnect diagnostic tool.
11. Reconnect the 4-wire harness from control board to motor.
Electrical Checks - High Voltage Power Circuits
Warning
HIGH VOLTAGE!
Disconnect ALL power before servicing or installing. Multiple power sources may be present.
Failure to do so may cause property damage, personal injury or death.
1.
2.
3.
Warning
Line Voltage now present.
4.
5.
6.
7.
8.
Part 6 Service Diagnosis
The green LED on the diagnostic tool will blink indicating communications between the
tool and motor. See table below for indications of tool indicators and motor actions.
Replace or repair as needed.
Power Green
Button LED
OFF OFF
ON Blinking
ON OFF
ON Blinking
ON OFF
Depress the orange power button to turn off motor.
Disconnect power to air handler or modular blower.
Disconnect the 5-circuit power connector to the ECM motor.
Turn on power to air handler or modular.
Measure voltage between pins 4 and 5 on the 5-circuit connector. Measured voltage
should be the same as the supply voltage to the air handler or modular.
Measure voltage between pins 4 and 3. Voltage should be approximately half of the
voltage measured in step 4.
Measure voltage between pins 5 and 3. Voltage should be approximately half of the
voltage measured in step 4.
If no voltage is present, check supply voltage to air handler or modular blower.
Disconnect power to air handler or modular blower. Reconnect the 5-circuit power
harness disconnected in step 2.
Motor
Action
Not Confirm 24VAC to UltraCheck-EZ
Rotating is confirmed, diagnostic tool is inoperable.
Rotating Motor and control/end bell are functioning properly.
Rotating Replace motor control/end bell.
Not Check motor (refer to Motor Checks on page 396).
Rotating
Not Replace motor control/end bell; verify motor (refer to
Rotating Motor Checks on page 396).
}
1
Lines 1 and 2 will be connected
for 120VAC Power Connector
2
applications only
3
Gnd
4 AC Line Connection
5
AC Line Connection
Indication(s)
TM
tool. If 24VAC
Check
394