Frostwash Setting On Outdoor Unit; Auto-Frostwash Flow - Hitachi PC-ARFG-E Installation & Operation Manual

FUNCTION MENU

5.13.3 FrostWash setting on outdoor unit

To use this function in the VRF system, function selection F1
needs to be configured on the outdoor units. FrostWash setting
is disabled on the factory default setting. Set Function Selection
F1 according to the following table.
Auto-FrostWash
"F1" Setting
Condition
"Interval" Time
Duration
0 Factory Setting (Default): Not available FrostWash
Total Comp.
1 Operation Hour:
500h
Total Comp.
2 Operation Hour:
1000h
Total Comp.
3 Operation Hour:
500h
Total Comp.
4 Operation Hour:
1000h
Total Indoor Unit
Fan Operation
5 Hour: Depending
on Main Wired
Controller Setting
*1: Only one "Main Wired Controller" exists in the same
refrigerant cycle, and all the others are "Sub Wired Controller".
Refer to "6.1.12 Main Remote Setting"
details of Main Wired Remote Controller setting.
*2: You can set the schedule for the FrostWash operation from
the Main Remote Controller. Otherwise, the FrostWash
operation will start soon after the system is stopped.

5.13.4 Auto-FrostWash Flow

Last FrostWash
Operate
• Auto-FrostWash is disabled in default setting. To enable this
function, set the Auto-FrostWash be enabled.
• If the Auto-FrostWash is stopped, the total operating time will
be reset.
?
N O T E
In the case of 2 remote controllers, FrostWash can be set only on the
primary wired remote controller.
29 PMML0565 rev.1 - 04/2022
Manual
FrostWash
Start-up
Operation
Timing
2 hours
after system
stopped
Operate outdoor
unit PSW
Within the
time zone
scheduled by
Main Wired
Controller*
1,2
Within the Operate from
time zone Main Wired
scheduled by Controller*
Main Wired operate outdoor
Controller* unit PSW
1,2
in this manual for the
The total operating time is 100 hours
(Default setting)
*1: Wired remote controller can set 50-400 hours.
Cooling or other
Cooling or other
mode
Stop Operate
This function suppresses a clog on the heat exchanger.
First, freeze the indoor unit heat exchanger when whole system
is under stoppage. Then defrost it to remove the dust with drain
water. Auto-FrostWash and Manual FrostWash are selectable.
?
N O T E
• This function cannot be set when the indoor unit and the outdoor unit
do not support this function.
• Depending on the outdoor unit, the settings on the outdoor unit may
be required.
• Cracking noise may be heard during freezing or defrosting phase due
to temperature change. Refrigerant flow noise may also be heard.
The noise may be heard relatively louder in a quiet environment. It is
recommended to set "Auto-FrostWash Schedule" when room is not
occupied.
• Ice fog may come out from air outlet during FrostWash operation. Ice
fog could happen in a humid environment such as the room humidifier
is used in a small room.
• This function is not available to operate where the outside temperature
is lower than 1°C or higher than 43°C.
• This function is not available to operate where the room temperature
is lower than 15°C or higher than 30°C.
• The level of dust removed is depend on usage environment.
• Limitations and settings are required when using this feature in a VRF
or
1
system.
Start FrostWash
*1
Approx. 3 min
*2
*2: Change
according to the
outdoor unit.
FrostWash
mode preparation
Stop
FrostWash Completed
Approx. 10 min to 35 min.
*3
*3: Change according to
indoor temperature and
outdoor temperature
FrostWash
Automatically
Stop