Defrost termination
The defrost will terminate if:
-The temperature programmed in parameter 24 has been reached in probe 2 (requires an additional input for
the second probe and activating it via parameter P4).
-Time set in parameter d1 has passed (maximum duration of defrost).
-The
H
key is pressed for 5 seconds.
Message displayed during defrost
Set by parameter d2, with the choice of showing the actual temperature detected by probe 1 (d2=0), displaying
the temperature detected by probe 1 at the start of defrost (d2=1) or displaying the DEF message (d2=2). The d3
parameter defines the time during which the message is displayed, once the drip time (D9) and the fan stop time
(F4) is over.
Parameter d5 allows users to specify if the unit will (d5=1) or will not (d5=0) defrost when powered up (initial
start-up or after a power failure). In case of choosing option YES (d5=1), the defrost will start after the delay time
specified in d6.
Using parameter d8, users define the computation of time in d0, choosing between total time elapsed (d8=0) or
the total compressor running time (d8=1).
NOTE:
If parameter d1 is set to 0, no defrost will be performed.
Defrosting is not performed if the controller is set to heat mode (P0=1)
It works the same way as defrost, but acts on the auxiliary relay (only if P6=1), controlled by probe 3 and serves to
control defrost of a second evaporator.
Defrost Master - Slave
This feature allows users to synchronize defrost of several units. This is especially suitable for cabinets with multiple
independently controlled evaporators, thus avoiding having an evaporator defrosting (generating heat) while the
next is generating cold.
When the main controller designated as Master (P6=5) initiates a defrost, it forces the rest, which must be
configured as slaves (P10 or P11=4), to initiate their defrost cycles.
When the main controller ends the defrost according to the time set by d1 (the temperature in probe 2 is not taken
into account) it will force slaves to end defrosting and start synchronised drip time.
The master defrost function can only be set on 4-relay units and requires the use of an external relay (see diagram
on next page).
Up to 15 units may be connected to a Master Controller and the maximum distance should not exceed 15 metres.
Other parameters
Second defrost
(only 4-relay controllers)
13
