Daikin VRV III REYQ8PY1B, Service Manual

Page: 179 / 472

Test Operation SiBE37-701
168 Test Operation
In case of heating mode
(7) Push the TEST button (BS4) once within 5 minutes after procedure (5) (*4) and close the all
front panels.
After that, open the valve A immediately (See figure on page 167) (*6) and check the
charged amount by measuring device.
During operation, if the remote controller display shows “P2” or “P8” code, close the valve A
immediately and refer to [Remote controller heating mode malfunction code].
Beware the fan running when open the front panel.
The fan may continue rotation after the system stop the operation.
(8) When the required amount of refrigerant is charged, close the valve A (See figure on page
167) (*8) and push the RETURN button (BS3) once. And then go to procedure (9).
(9) Push the MODE button (BS1) once, and the charging is complete.
Notes (*1)~(*9)
(*1) Lead the refrigerant charge hose etc. from the pipe intake.
All front panels must be closed at the procedure (7).
(*2) • If you perform the refrigerant charging operation within the refrigerant system that have the
power off unit, the operation cannot finish properly.
Check the number of outdoor and indoor units that is powered.
For checking, see [How to check how many units are connected] on page 164.
• To energize the crankcase heater, make sure to turn on for 6 hours before starting
operation.
(*3) It takes about 2~10 minutes for getting stability of refrigerant state.
If the additional refrigerant is little and operation is started before getting stability, the
system can not judge the charging amount precisely and it cause over charge.
(*4) If the TEST button (BS4) is not pushed within 5 minutes, “P2” code will displayed in the
remote controller. In this case, refer [Remote controller cooling (or heating) mode
malfunction code] on page 168, 169.
(*5) If the front panel is opened during the operation, the system cannot operate properly.
(*6) If you leave the system without connecting the refrigerant tank or opening the valve A for 30
minutes or more, the system stop operation and “P2” code are displayed in remote
controller.
In this case, refer [Remote controller cooling (or heating) mode malfunction code].
(*7) Depending on the situation of operation such as the charging amount is little, the “PE” code
may not be displayed and the “P9” code may be displayed.
(*8) Always close the valve A and take the tank off.
The refrigerant charge port of this unit have electric expansion valve and the valve are
closed when charging is finished. However, the valve will opened when ather operation
(Check operation, nomal operation, etc.). If you leave the tank connected, the refrigerant
will charged and it cause over charge.
[Remote controller cooling mode malfunction code]
Code The work contents
PE Charging is almost finished. Ready to close the valve A.
PA
PH
The refrigerant tank is empty. Close the valve A and replace empty tank to the new tank. After changing
the tank, open the valve A again.
Beware the fan running. The outdoor unit does not stop operation.
P8 Close the valve A immediately, and restart the operation from procedure (3).
P2
Operation is interrupted. Close the valve A immediately and
check the below items.
z
Check if HP/LP gas pipe, suction gas pipe or liquid
pipe shutoff valve is opened.
z
Check the refrigerant tank is connected and the valve
A was opend.
z
Check if the air inlet and outlet of the indoor unit are not
closed by an obstruction.
After correcting the abnormality,
restart the operation from procedure
(3).
∗
Operation is stoped abnormally. Close the valve A immediately.
Confirm the malfunction code and correct the abnormality
following the [Remote controller displays malfunction code] in
chapter 11-2-2.
P9 Charging is finished. Close the valve A and take the refrigerant tank off.