Daikin SERHQ020BAW1, Installation And Operation Manual

Page: 21 / 60

5 Installation
Installation and operation manual
21
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-2B – 2018.01
Error code Solution
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
"7.6 Correcting after
abnormal completion of the test run" on page 38 .
5.6.6 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 "7.5 To perform a test run
of the outdoor unit" on page 37 ), and the unit will work properly.
(Error code will be displayed on the indoor unit.)
However, the refrigerant leak detection function cannot be used
before completing the refrigerant charging operation and the
judgement of the initial amount of refrigerant by performing the test
operation again.
Overcharging judgement procedure
1 Close all front panels except the electrical component box front
panel and the lid on the side of the electrical component box.
2 Turn on the power to the outdoor unit and all connected indoor
units.
3 Press BS1 once so the H1P LED is off.
4 Press and hold BS4 down for 5 seconds.
Result: The system will start to operate.
5 Close all front panels.
Result: After operating for 40 minutes, operation will stop
automatically.
6 After the system has stopped operating, check the user
interface display.
7 If , or is displayed on the user interface as a result of
the overcharging judgement procedure, recover 20% of the
charged amount of refrigerant and perform this procedure
again.
8 When no more overcharging of refrigerant is detected, start
automatic refrigerant charging from
"Step 6a: To automatically
charge refrigerant" on page 18 .
5.6.7 To input the additional refrigerant charge
weight
Availability of the leak detection function feature requires input of the
additional refrigerant charge amount immediately after finishing
automatic charging. The input must be executed before performing
the test operation.
NOTICE
If a wrong value is input for the additional charged
refrigerant weight, the accuracy of the leak detection
function will decrease.
Procedure
1 Close the electrical component box lid and all front panels
except the one on the side of the electrical component box.
2 Press and hold BS1 for 5 seconds to enter setting mode 2.
Result: The H1P LED is on.
3 Press BS2 14 times. The LED display will be as follows.
4 Press BS3 to confirm.
Result: LEDs will be blinking in function of the last entered
setting (factory setting = 0 kg).
5 Enter the weighed and already recorded amount of additional
refrigerant charge (not the total amount of refrigerant present in
the system) by selecting the corresponding LED display. Press
BS2 to scroll through the possible LED combinations until the
LED combination corresponds to the weight of additional
refrigerant charge you must input.
6 Press BS3 to select the required input and press the button
again to confirm the input into the PCB.
▪ Possible LED combinations in function of weight of additional
refrigerant charge (= x) to input
Value number Weight (kg) LEDs
0 x=0
1 0<x<5
2 5≤x<10
3 10≤x<15
4 15≤x<20
5 20≤x<25
6 25≤x<30
7 30≤x<35
8 35≤x<40
9 40≤x<45
10 45≤x<50
11 50≤x<55
12 55≤x<60
13 60≤x<65
14 65≤x<70