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Check
SiUS281811EA
312
Part 6 Service Diagnosis
Warning
Warning
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
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.
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.
Power
Button
Green
LED
Motor
Action
Indication(s)
OFF
OFF
Not
Rotating
Confirm 24VAC to UltraCheck-EZ
TM
tool. If 24VAC
is confirmed, diagnostic tool is inoperable.
ON
Blinking
Rotating
Motor and control/end bell are functioning properly.
ON
OFF
Rotating
Replace motor control/end bell.
ON
Blinking
Not
Rotating
Check motor (refer to Motor Checks on page 314).
ON
OFF
Not
Rotating
Replace motor control/end bell; verify motor (refer
to Motor Checks on page 314).
1
2
3
4
5
Lines 1 and 2 will be connected
for 120VAC Power Connector
applications only
Gnd
AC Line Connection
AC Line Connection
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Summary of Contents for SkyAir RZR-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Page 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Page 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Page 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Page 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Page 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...