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Mitsubishi Electric PURY-P72 Service Handbook page 286

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Table of Contents
[ IX Troubleshooting ]
Troubleshooting according to the remote controller malfunction or the external input error
In case of ME remote controller
In case of ME remote controller
1. Phenomena
Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running.
(Power indicator
does not appear on the screen.)
(1) Cause
1) The power for the M-NET transmission line is not supplied from the outdoor unit.
2) Short circuit of the transmission line.
3) Incorrect wiring of the M-NET transmission line on the outdoor unit.
ŒDisconnected wire for the MA remote controller or disconnected line to the terminal block.
ŒThe indoor transmission line is connected incorrectly to the transmission terminal block for centralized controller (TB7).
4) Disconnected transmission line on the remote controller.
5) Remote controller failure
6) Outdoor unit failure (Refer to IX [8] Troubleshooting Using the Outdoor Unit LED Error Display.)(page 353)
(2) Check method and remedy
1) Check voltage of the transmission terminal block for of the ME remote controller.
ŒIf voltage between is 17V and 30V -> ME remote controller failure
ΠWhen voltage is 17V or less -> Refer to IX [4] -8- (2).(page 333)(page 337)
2) When 2) and 3) above apply, check code 7102 will be displayed on the self-diagnosis LED.
HWE1116D
- 277 -
GB
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