AKO -D101 Series, Руководство пользователя

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4.2.- Defrost control
(not available in thermometers)
On units with 1 relay, defrost can only be set by compressor shutdown.
On units with 2 or 3 relays, the auxiliary relay must be set as "defrost" (P6=1), except for
defrost by compressor shutdown.
Defrost is initiated if:
-Time scheduled in parameter d0 has passed since the beginning of last defrost.
-It is time for one of its scheduled start-ups (parameters d10 to d15). This feature requires that d0 is set to 0
(only units with RTC).
-The
H
key is pressed for 5 seconds
Defrost type
Selected by parameter d7 to define the controller performance during the defrost process.
Drip time
Parameter d9 sets drip time and the time added at the end of defrost cycle to allow for drainage of the remaining
water in the evaporator. During this time the compressor and fans will not be running (unless defrost is by air).
Defrost start-up
By compressor shutdown
(d7=3)
The compressor stops and the defrost takes place statically.
Fans will stop running regardless of parameter F3.
By air
(d7=2)
(models with 2 or more relays)
Fans start running and the compressor starts up. Defrost takes place by air being forced
through the evaporator.
Fans will be on regardless of parameter F3.
By resistors
(d7=0)
(models with 2 or more relays)
The defrost resistors start up and the compressor stops; defrost is the result of heat from the
resistors.
Fans will be running or not depending on parameter F3.
Reverse cycle (Heatpump)
(d7=1)
(models with 2 or more relays)
A 4-way valve is activated which reverses the cold-generating circuit and the compressor starts
up, forcing the defrost.
Fans will be running or not depending on parameter F3.
By hot gas
(d7=1)
(models with 2 or more relays)
A valve is actuated which discharges gas from the compressor to the evaporator inlet. A check
valve prevents hot gas from returning to the liquid line.
Fans will be running or not depending on parameter F3.
12
CONTROL
time
ºC
F4 Max. d1 d3
d9
d0
SP
SP+C1
d4
DEFROST DEFROST
DRIP
TIME
FAN START DELAY
“DEF” MESSAGE
CONTROL CONTROL