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
b) A measuring example during normal stop
5V/div, 1sec/div:
5V/div, 1sec/div:
c) Expanded waveform 1 (signal 111000....)
d) Expanded waveform 2 (50Hz carrier)
5V/div, 10msec/div:
5V/div, 2µsec/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.
Transmission
from
remote
controller
Transmission
from
indoor unit
Transmission
from
remote
controller
Transmission
from
indoor unit
7.5
seconds
7.5
seconds
OCT04A-2.qxp 04.9.29 9:15 AM Page 35
