6 Installation
Installer and user reference guide
27
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1A – 2018.01
Waiting for stable heating
conditions (next ±15 minutes
(depending on the system))
Ready for charging
2
Press BS4 once within 5 minutes. If BS4 is not pushed within
5 minutes,
will be displayed on the user interface.
3
When the following LED display is shown, open valve A and
close the front panel. If the front panel is left open, the system
cannot operate properly during the refrigerant charging.
* = The state of this LED is not important.
NOTICE
When a malfunction occurs, check the user interface
display and refer to
"6.7.5 Error codes when charging
.
4
When the calculated amount of refrigerant minus 10 kg is
reached, close valve A and press BS3 once.
5
Press BS1 to complete charging.
6
Record the amount that was added on the additional refrigerant
charge label provided with the unit and attach it on the back
side of the front panel.
7
Perform the test procedure described in
added using manual charging (heating mode, pre-charging)" on
page 46
.
Manual refrigerant charging in cooling mode
1
Start up the unit and wait while it is preparing for charging in
cooling mode.
Pressure control (first minute)
Startup control (next
2 minutes)
Waiting for stable conditions
(next ±15 minutes (depending
on the system))
Ready for charging
2
Press BS4 once within 5 minutes. If BS4 is not pushed within
5 minutes,
will be displayed on the user interface.
3
When the following LED display is shown, open valve A and
close the front panel. If the front panel is left open, the system
cannot operate properly during the refrigerant charging.
* = The state of this LED is not important.
NOTICE
When a malfunction occurs, check the user interface
display and refer to
"6.7.5 Error codes when charging
.
4
If the user interface display shows a flashing
code, charging
is almost finished. When the unit stops operating, close valve A
immediately, check the LEDs, and check if
is displayed on
the user interface. When the charging amount is little, the
code may not be displayed, but instead
will be displayed
immediately. If the LED display is not as shown below, correct
the malfunction (as indicated on the user interface display) and
restart the complete charging procedure.
5
Press BS1 once to complete charging.
6
Record the amount that was added on the additional refrigerant
charge label provided with the unit and attach it on the back
side of the front panel.
7
Perform the test procedure described in
added using manual charging (cooling mode)" on page 45
.
6.7.5
Error codes when charging refrigerant
Heating mode error codes
Error code Solution
recharge
operation
Close valve A immediately and press the TEST
OPERATION button once. The operation will restart
from the charging mode judgement onwards.
charging
aborted
▪ Close valve A immediately. Check following items:
▪ Is the gas side stop valve opened correctly?
▪ Is the valve of the refrigerant tank open?
▪ Are the air inlet and outlet of the indoor unit
obstructed?
▪ Correct the abnormality and restart the automatic
charging procedure.
Cooling mode error codes
Error code Solution
,
,
replace
refrigerant
tank
▪ Close valve A and replace the empty refrigerant
tank. When replaced, open valve A (the outdoor unit
will not stop operating).
▪ The code on the display shows the unit where a
cylinder is to be renewed:
= master unit,
=
slave unit 1,
= slave unit 2, flashing
,
and
= all units
recharge
operation
Close valve A immediately. Restart the automatic
charging procedure.
charging
aborted
▪ Close valve A immediately. Check following items:
▪ Is the gas side stop valve opened correctly?
▪ Is the valve of the refrigerant tank open?
▪ Are the air inlet and outlet of the indoor unit
obstructed?
▪ Correct the abnormality and restart the automatic
charging procedure.
*
abnormal
stop
Close valve A immediately. Confirm the malfunction
code on the user interface and correct the abnormality
by following the information
abnormal completion of the test run" on page 46
.
6.7.6
Final adjustment of the refrigerant amount
When the LEDs indicate that the indoor or outdoor temperature is
out of range, automatic charging of refrigerant cannot be completed.
When the temperature has come in range (outdoor = 0~43°C, indoor
= 20~32°C), perform the overcharging judgement procedure to
complete refrigerant charging.
Out of outdoor temperature
range
Out of indoor temperature
range
In this case, perform a test operation (see
of the outdoor unit" on page 45
), and the unit will work properly.
(Error code
will be displayed on the indoor unit.)
