Fault Code A3: Transmission line busy when Mr.Slim is connected on M-Net transmission line.
Fault: Transmission line busy when Mr.Slim is connected on M-Net transmission line.
No data could be transmitted for 8 minutes.
Check A-MNET connections (TB7).
For Mitsubishi split and multi-split air conditioning systems included wall-mounted, duct-connected, console split, bulkhead, ceiling mounted and multi-head split units.
If molded case circuit breakers or earth leakage circuit breakers have tripped, do not reset the breaker immediately without first checking for any problems with insulation of equipment.
Resetting breakers without a check of insulation may cause damage to equipment.