17
This function is only activated if the unit is not controlled
by a thermostat. It starts and stops the indoor fan. The fan
can be activated either continuously or only if any capacity is
applied. The user selects the desired performance configura-
tion in the GEN_CONF menu. The configuration selected
can differ in the occupied mode and unoccupied mode.
The head pressure is independently controlled for each
circuit, based on the saturated condensing temperature value.
This option does not require an additional board. It permits
avoiding a high-pressure cut-out on a circuit by:
• not allowing any capacity increase on this circuit if the
high-pressure value reaches a first threshold,
• unloading one compressor if a second protection
threshold is reached.
If a compressor is unloaded, no capacity increase to the
affected circuit is allowed for several minutes.
If a circuit is shut down, it is evacuated to purge the
refrigerant from the evaporator and the suction line.
The Pro-Dialog+ control system has many fault tracing aid
functions. The local interface and its various menus give
access to all unit operating conditions. If an operating fault
is detected, an alarm is activated and an alarm code is
stored in the Alarms menu, sub-menus CUR_ALRM and
ALARMRST.
The alarm LED on the unit permits an immediate alarm
display. This is followed by a blinking sequence that describes
the alarm code: the first one is for tens’ number, and the
second one for ones’ number.
Example:
Alarm 36 is detected by the Pro-Dialog control, the LED
lights up continuously for 5 seconds, then blinks three times,
stops and blinks six times, stops and continues the cycle.
The Pro-Dialog control permits display of up to five active
unit fault codes.
The alarm LED on the interface (see chapter 4.1) allows
the quick display of the unit status.
• A flashing LED shows that the circuit is operating but
there is an alert.
• A steady LED shows that the circuit has been shut
down due to a fault.
The ALARMRST menu on the main interface displays up
to five fault codes that are active on the unit.
When the cause of the alarm has been corrected the alarm
can be reset, depending on the type, either automatically
on return to normal, or manually when action has been
taken on the unit. Alarms can be reset even if the unit is
running.
This means that an alarm can be reset without stopping the
machine. In the event of a power supply interrupt, the unit
restarts automatically without the need for an external
command. However, any faults active when the supply is
interrupted are saved and may in certain cases prevent a
circuit or a unit from restarting.
Manual reset must be done with the push button or run from
the main interface via the ALARMRST menu, item RST_
ALM. Depending on the configuration in the GENCONF
menu, access to the item may be protected by a password.
(22 paginas)
(28 paginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales