Example 7: Transmission Wiring Between The Cool/Heat Selector And The Outdoor Unit Is Too Close To A High Voltage Wire - Panasonic Urban Multi MX1 Series Manual

PACD011001G2 / PACD011004G3
7.7 Example 7:
outdoor unit is too close to a high voltage
Situation
Heating is indicated despite having selected cooling with the cool/heat selector.
Cause and
The transmission wiring between the cool/heat selector and the outdoor unit is too close to a high voltage
Remedial Action
wire. An induced voltage is, therefore, being impressed on the transmission wiring which is causing a
heating/cooling malfunction in the outdoor unit PC board.
Bypassing the transmission wiring will allow the unit to function normally.
Main Points
Urban Multi Inverter "MX1" Series
Transmission wiring between the cool/heat selector and the
Keep low and high voltage wiring away from each another.
Bad Examples and Good Examples in Installation
wire.
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