Setting up the speed
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 continuously at selected fixed speed Smin or
Smax.
• Sleep Energy Saving mode:
Compressor will run during four hours. During
first hour compressor 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 Electronic Integral Manager of the appliance
(EIM) permanently connected to the electronic
driver FDC3 through the SPI, using its serial
communication capability. The EIM reads the
current 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 communicates
how the compressor should operate and,
eventually, records and displays any abnormal
circumstance that might occur. For details about
the communication protocol, please contact
Danfoss.
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.
Table 5. External
selection of the velocity
0=Open connection;
1=Shortened
Connection to COM
Speed of the
motors (rpm)
Sleep mode
IN1
IN2
0
0
Smin
off
1
0
Smin
on
0
1
Smax
off
1
1
Smax
on
12
FRCC.PC.041.A1.02