The following signals are sent by the control of the external unit.
• The current operating mode.
• Current compressor speeds
• The outside temperature
• The existence of functioning of the protection circuit
To transfer these signals, the control of the indoor unit monitors the contents of the signals and assesses the occurrence of problems.
The contents of the evaluation are described below.
• Whether the current operating conditions are in accordance with the signal from the operating command.
• If the protection circuit is working
When no signal is received from the control of the outdoor unit, a problem is assumed.
