10
Connection to COM
Speed of the
motors (rpm)
Sleep mode
IN1
IN2
0
0
S
min
off
1
0
S
min
on
0
1
S
max
off
1
1
S
max
on
Table 5. External selection of the velocity 0=Open connection; 1=Shortened
NO SWITCH (MANUAL I/O, TILT, ETC.) IS ALLOWED TO
BE CONNECTED IN SERIES WITH THE THERMOSTAT.
IF ELECTRONIC THERMOSTATS ARE TO BE FIT, AVOID
THOSE THAT INCORPORATE MANUAL I/O SWITCH AND/
OR STARTING DELAY.
• Sleep mode:
Compressor will run during four hours after start-up. The
speed can be limited by a fixed programmed value and
even more by the available battery voltage as described in
standard mode. The speed can also be limited by external
switching in a similar way as described in standard mode
according to table 5:
If off sleep mode is selected, the appliance will run continu-
ously at selected fixed speed Smin or Smax.
• Sleep Energy Saving mode:
Compressor will run during four hours. During first hour com-
pressor will run at selected speed. During next three hours
speed will decrease up to 2,000 r.p.m. Programming Sleep
Energy Saving is done in the same way as Sleep.
• Slave mode:
Under this mode, variable speed is controlled by an Electron-
ic Integral Manager of the appliance (EIM) permanently con-
nected to the electronic driver FDC3 through the SPI, using
its serial communication capability. The EIM reads the cur-
rent temperature inside the appliance, compares it with the
set point temperature, and decides if the compressor should
operate or not, and if so, at which speed. The EIM commu-
nicates how the compressor should operate and, eventually,
records and displays any abnormal circumstance that might
occur. For details about the communication protocol, please,
contact Huayi Compressor Barcelona.
IF ANY VARIABLE SPEED MODE IS TO BE PROGRAMMED,
CHECK CAREFULLY FOR TUBES, CONDENSER AND
EVAPORATOR RESONANCES. NATURAL FREQUENCIES
SHOULD BE 75 Hz UP TO AVOID VIBRATIONS.
