Sanyo CM1972 - Manual (Page 43)

Control/conditions
COOL The ON/OFF operation
button on the remote
controller is pressed.
The room temperature
has reached the
desired temperature.
The outdoor unit does not operate for 3 minutes
even after the breaker is turned ON.
This is in order to stabilize the return of oil to the
compressor.
The outdoor unit starts.
(Compressor and the outdoor fan start.)
When the frequency reaches Hz,
frequency increases are stopped for a period
of seconds. (Refer to Table 1.)
If the indoor and outdoor temperatures are high,
the current peak cut-off activates, stopping
any increases in frequency.
The frequency then increases.
Operating frequency is stabilized in order to
maintain a comfortable environment.
The indoor temperature and the desired
temperature are approximately equal.
The thermostat turns
ON again.
After 3 minutes, the outdoor unit begins operating
automatically.
During these 3 minutes, a pressure balance is
achieved, allowing the compressor to start
more easily.
After the thermostat turns ON again, the
outdoor unit will not operate for 3 minutes,
even if the room temperature increases
above the desired temperature.
Operation is restarted
within 4 hours (only when
AUTO mode is selected
with the remote
controller).
Within 4 hours after operation was stopped, it is
assumed that there has been no significant
change in the indoor and outdoor temperatures,
and the previous conditions (COOL) are stored.
Starts operating in the same operating mode
(COOL) and with the same temperature
settings as before operation was stopped.
Operation starts after 4
hours or more have
passed.
New operating mode is determined based on
the temperature conditions at the time the
ON/OFF operation button is pressed.
Stop All indicator lamps turn OFF. The indoor and
outdoor units stop.
Freeze prevention In order to protect against freezing, the
compressor stops temporarily, until the
temperature of the indoor heat exchanger has
risen.
The thermostat turns
OFF.
The outdoor unit stops. (It does not stop if the
thermostart for another indoor unit is ON.)
Unit operation Explanation
The operation lamp illuminates.
The indoor fan operates at the set fan speed.
The outdoor unit stops.
When the temperature of the indoor heat
exchanger drops to approximately 35.6 °F
or below, the compressor turns OFF, the
outdoor fan turns OFF, and the indoor fan
continues operating with no changes.
Approximately 3 minutes later, if the
temperature of the indoor heat exchanger
is adove 46.4 °F, the system returns to its
original conditions.
The frequency is increased at the rate of 0.5
Hz every 1 seconds.
Frequency control
(Hz)
(25) Hz
(35) Hz
(45) Hz
(55) Hz
Outdoor air temperature is below 32 °F.
(120) seconds
(60) seconds
(60) seconds
(180) seconds
Table 1
(senconds)
Outdoor air temperature is 32 °F or higher.
(60) seconds
(30) seconds
(30) seconds
(90) seconds
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