Cod. +030220151 - Rel. 2.1 - 04/09/98
38
OPERATING STATES OF THE EQUIPMENT
As indicated above, the display LEDs can be in three states:
•
off, when the function indicated or the actuator is not operative;
•
on, when the function indicated or the actuator is operative;
•
flashing, when the function is held up by an alarm situation, by a delay, or by a particular state of the
Multifunction input.
There are however various particular operating states not directly indicated by the displays. This can lead to
erroneous interpretation of the equipment's operating state. For convenience, the state of the display in such
situations is given below:
"PARTICULAR" STATE
COMP LED
FAN LED
DEF LED
C.CYCLE LED
Defrost interval
è
è
off
è
Awaiting defrost
è
è
off
è
Defrost requested
è
è
flashing
è
Defrost in progress
è
è
on
è
Dripping
off
off
off
è
Post-dripping
è
flashing
è
è
Serious alarm
è
è
è
è
è
signifies that the LED may be on, off or flashing as a function of other parameters and ambient factors
(temperature, operating set, differential etc.). General remarks made earlier on the state of LEDs should
be borne in mind.
SEQUENCE OF MAIN PHASES
For easy reference we give below a diagram showing the sequence of all the possible phases in the process
of defrosting. It should be remembered that some phases (e.g. dripping or post-dripping) can be activated or
inhibited by an appropriate choice of parameters. The type of activators being controlled and the type of
control depend on the type and configuration of equipment selected.
PHASE
normal
operation
defrost
dripping
post dripping
resumption of
normal
Models
applicable
all (*)
IR32S, IRDRSE/S0
when H1=1, all others
IR32S, IRDRSE/S0
when H1=1,all others
IR32C, IRDRC
and IR32P
all (*)
Action
unit's
temperature
controlled
evaporator defrosted
as chosen
compressor and
evaporator fans
(latter on IR32C,
IRDRC and IR32P
only) are shutdown
in order to help
drainage of water
after defrosting.
fans are shut off
to allow the
evaporator
again operating
temperature
control of
temperature
resumed
(*) The thermometer version IR32M is obviously excepted.
The sequence progresses from left to right.
