AKO AKO-16520, User Manual

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1652H302 Ed.03
15
Reversed cycle ( InI= 9 y 10) ( d7 =3)
A 4-way valve is used to invert the installation cycle, using the evaporator as a condenser to melt the ice formed.
The process begins by stopping cold production (if it is active). If Pump Down is active, defrost begins once the
manoeuvre is complete.
Next, the 4-way valve is activated (DEF relay ON), alongside the solenoid (COOL relay ON) and the compressor
(AUX 1 ON), and the defrost process begins. D1 time begins to be counted after the COOL relay is activated.
When defrost is complete, the manoeuvre can be stopped in two possible ways:
-Pump down active (Inl=9): The solenoid closes (COOL relay OFF) and the 4-way valve returns to its initial
position (DEF relay OFF) whilst the compressor continues to operate (AUX 1 relay ON), until the low pressure
switch activates, stopping the compressor (AUX 1 relay OFF), starting the drip time.
-Without Pump Down (Inl=10): The solenoid closes (COOL relay OFF) and the 4-way valve returns to its initial
position (DEF relay OFF) and the compressor stops (AUX 1 relay OFF), starting the drip time.
Defrost control
Defrost start
Defrost will start if:
-The time programmed in parameter d0 has elapsed since the start of the last defrost.
-We press the
H
key for 3 seconds.
-By means of an external push-button ( I10 / I11 =5).
-Through the app or through AKONet.
Defrost completion
Defrost will complete if:
-The temperature programmed in parameter d4 has been reached in probe 2. This requires a 2nd probe
( l00 =2) to be available, located in the evaporator.
-The time configured in parameter d1 has elapsed (maximum defrost duration).
-We press the
H
key for 5 seconds.
-By means of an external push-button ( I10 / I11 =5).
-Through the app or through AKONet.
Drip time
This is established through parameter d9 and sets the time added at the end of defrost to allow for the removal of
surplus water from melted evaporator ice, during which there is no cold regulation.
DEFROST
COLD REGULATION
COLD REGULATION
F4
Máx. d1 d3 d9
d0
SP
SP+C1
d4
DEFROST
DRIP TIME
FAN START-UP
DELAY
"DEF” MESSAGE
S1