Item
Operation flow and applicable data, etc.
Description
10. Temporary
operation
Pressing [RESET] button starts the temporary opera-
tion of [AUTO] operation. When keeping [RESET]
button pressed for 10 seconds or more, the temporary
[COOL] operation is performed.
1) When pressing [RESET] button, the
temporary [AUTO] operation starts.
2) When keeping [RESET] button pressed
for 3 seconds or more, Pi, Pi, Pi sound is
heard and [AUTO RESTART] control is
changed.
3)
4)
When keeping [RESET] button pressed
for 10 seconds or more, “Pi” sound is
heard and the temporary [COOL]
operation starts.
To stop the temporary operation, press
the button again.
Press RESET button.
Did you press [RESET] button
for 3 seconds or more?
Did you press [RESET] button
for 10 seconds or more?
Switch to [AUTO RESTART] control.
YES
NO
NO
YES
Temporary [AUTO] operation
Temporary [COOL] Operation
11. Discharge temperature control
1. Purpose
This function detects error on the
refrigerating cycle or error on the com-
pressor, and performs protective control.
2. Operation
• Control of the compressor speed
The speed control is performed as
described in the left table based upon
the discharge temperature.
Td value
117°C
115°C
106°C
103°C
96°C
Control operation
Judges as an error and stops the compressor.
Reduce the compressor speed.
Reduce slowly compressor speed.
Keeps the compressor speed.
If the operation is performed with lower speed than one
commanded by the serial signal, speed is slowly raised
up to the commanded speed.
Operates with speed commanded by the serial signal.
Control operation
55°C 49°C
Cooling
(TE)
Heating
(TC)
63°C
63°C
61°C
59°C
62°C
57°C
55°C
53°C
12. High pressure control
1. Purpose
This function detects error on the
refrigerating cycle or error on the com-
pressor, and performs protective control.
2. Operation
Control of the compressor speed The
speed control is performed as described in
the left table based upon the heat
exchanger temperature (TE, TC).
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