Daikin SkyAir RZR-TA Series Service Manual page 318

Check
9. Depress the orange power button to turn off motor.
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. Disconnect power to air handler or modular blower.
2. Disconnect the 5-circuit power connector to the ECM motor.
3. Turn on power to air handler or modular.
Warning
Line Voltage now present.
4. 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.
5. Measure voltage between pins 4 and 3. Voltage should be approximately half of the voltage
measured in step 4.
6. Measure voltage between pins 5 and 3. Voltage should be approximately half of the voltage
measured in step 4.
7. If no voltage is present, check supply voltage to air handler or modular blower.
8. Disconnect power to air handler or modular blower. Reconnect the 5-circuit power harness
disconnected in step 2.
312
Power Green
Button LED
OFF OFF
ON Blinking
ON OFF
ON Blinking
ON OFF
}
1
2
3
Gnd
4 AC Line Connection
5
AC Line Connection
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 314).
Rotating
Not Replace motor control/end bell; verify motor (refer
Rotating to Motor Checks on page 314).
Lines 1 and 2 will be connected
for 120VAC Power Connector
applications only
SiUS281811EA
Indication(s)
TM
tool. If 24VAC
Part 6 Service Diagnosis