Daikin VRV REYQ96MTJU Design, Installation & Testing Instruction page 135

Si39-406
7.10.7 Example 7:
the 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 wire. An induced voltage is, therefore, being impressed on the transmission wiring which is
Remedial Action
causing a heating/cooling malfunction in the outdoor unit PC board.
Bypassing the transmission wiring will allow the unit to function normally.
Main Points
7.10.8 Example 8:
(Inverter K Series).
Situation An attempt was made to set the centralized control group number with the indoor unit remote
controller, but "00" cannot be selected in the field setting mode.
Cause 1. The central remote controller or unified ON/OFF controller is OFF.
2. The central remote controller or unified ON/OFF controller, or indoor unit is not wired to the
Remedial Action Supply power to either the central remote controller or unified ON/OFF controller.
Wire the central remote controller or unified ON/OFF controller, or indoor unit to the centralized
control line.
General Information
Transmission wiring between the cool/heat selector and
Keep low and high voltage wiring away from each another.
The centralized control group number cannot be set
centralized control line (F1 & F2).
wire.
Appendix
129