Daikin LX10F11B Service Manual Download

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1-17

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Pump down control

Pump down with EEV closed before defrosting
initiation, before heating operation, or during
the start-up control of the compressor. Collect
refrigerant into the receiver, and terminate the
pumping-down when the low pressure becomes
-40kPa (or EOS-LP(T)>30

℃

●

Automatic pump down

Automatic pump down is executed by pump down
with the LSV closed before replacement of dryer or
collecting refrigerant. Terminate pump down when
low pressure becomes -27kPa.
Then open HSV to raise the pressure on the low
pressure side slightly higher than atmospheric
pressure so that replacing the dryer afterwards can
be done easily. (Refer to paragraph 4.2. Automatic
Pumpdown)

1.5 Optional Functions

1.5.1 ASC, Automatic Setpoint Change

(Option)

●

ASC operation

This function works only in the chilled mode.
It can be possible to improve quality for some
types of cargo by automatically changing the set
temperature over time.
ASC function can specify the set temperature and
its duration automatically.

●

Setting for ASC operation

1.  The first set temperature SP1 and its duration TM1
2.  The second set temperature SP2 and its duration TM2
3.  Since, up to 9 patterns are available for setting

temperature (i.e.up to SP9). There is no duration
limit by the timer for the last set temperature.

＊

For some types of cargoes, dehumidification

control settings can be configured as well.

＊

The temperature inside is raised gradually

(0.5

℃

/Hr) to prevent rapid temperature rise

during the pull up operation.

SP1

SP2

SP3

TM1

TM2

TM3

ASC function starts to operate

Pull down

Pull up

Timer TM1
Count Starts

●

Access to ASC operation

Access to

※

2-5 ASC settings for ASC operation in

paragraph 2.3.

●

Display

During ASC operation "ASC" is displayed in the
SET-MODE area.
Press

key to check the ASC status during

operation display. The example below that among
five sets of temperature settings, the third set is in
operation remaining 15 hours.

CHILLED

RETURN 4.1C

HP:1200kPa

LP: 20kPa

MODULATION

SET POINT

2.0

℃

DEF-INT 12HR

SET-HU 70%RH

SET-MODE

DEHUMID
ASC

HUMID 75%RH

SUPPLY

2.1

℃

No.

Automatic Setpoint Change

Operation screen

ASC screen

▼

▲

▼

▲

SP(C) SHU(%) Hr REMAIN

-10.0

0.0

10.0

15.0

20.0

100

LAST

●

Cancellation of ASC operation

1. Cancellation of ASC operation
1) When configuring ASC to "OFF"
2) When F-PTI is completed
3) When Chilled-PTI is completed
4) When Frozen-PTI is completed
2. When the power is turned off (unit off) during

ASC operation, ASC operation restarts at next
power-on.

3. It is impossible to change the set temperature

and the set duration during ASC operation. To
change the settings, configure ASC settings to
"OFF" once and "ON" again.

4. The last set temperature is displayed on the

modem. The settings cannot be changed via the
modem.

5. The following items are recorded as event log:

ASC "ON" / "OFF", SP1, TM1, dHU1,
"ON" / "OFF", RH1, SP2 ----, SP3 ---

01̲01-22̲LX10F11B̲En.indd 1-17

2014/11/19 16:40:32

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