Daikin VRV RXYQ72-384XAYCA Service Manual page 389

SiUS342004EB
7.
8.
Motor Checks
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.
4.
5.
Part 6 Service Diagnosis
Locate the 3-circuit connector in the control/end bell. Using an ohmmeter, check the
resistance between each terminal in the connector. If the resistance is 1 M or greater,
the control/end bell is functioning properly. Replace the control/end bell if the resistance is
lower than 1 M.
Reassemble motor and control/end bell in reverse of disassembly. Replace blower
assembly into air handler or modular blower.
Disconnect power to air handler or modular blower.
NOTE: Motor contains capacitors that can hold a charge for several minutes after
disconnecting power. Wait 5 minutes after removing power to allow capacitors to
discharge.
Disassemble motor as described in steps 2 through 4 above.
Locate the 3-circuit harness from the motor. Using an ohmmeter, measure the resistance
between each motor phase winding. The resistance levels should be equal. Replace the
motor if the resistance levels are unequal, open circuited or short circuited.
Measure the resistance between each motor phase winding and the motor shell. Replace
the motor if any phase winding is short circuited to the motor shell.
Reassemble motor and control/end bell in reverse of disassembly. Replace blower
assembly into air handler or modular blower.
Check
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