Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 35

(3) The waveforms of from remote controller communications
The following graphs are the examples for measuring waveforms on the wirings of remote controlled transmission at the
terminal block for remote controller.
a) A measuring example in the sequence of startup
7.5
seconds
Transmission Transmission
from from
remote indoor unit
controller
5V/div, 1sec/div:
c) Expanded waveform 1 (signal 111000....)
5V/div, 10msec/div:
• During normal operation, the remote controller interactively exchanges signals with the indoor unit of refrigerant address "0".
When the remote controller cannot receive signals from the indoor unit of refrigerant address "0" for 3 minutes, it is considered
as abnormal. E0 is displayed on the remote controller as an error.
b) A measuring example during normal stop
Transmission Transmission
from from
remote indoor unit
controller
5V/div, 1sec/div:
d) Expanded waveform 2 (50Hz carrier)
5V/div, 2µsec/div:
35
7.5
seconds