Daikin REYQ8P8Y1B - 13 Service Mode Operation; 14 Additional Refrigerant Charging Method

REYQ8~16P8Y1B
VRVIII System air conditioner
4PW39996-1B
Installation manual
25
13. SERVICE MODE OPERATION
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1 When the unit is at standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to (ON).
- The indoor units, BS units and the outdoor unit expansion
valves will fully open.
- The H1P LED is on and the remote controller indicates
(test operation) and (external control) and the
operation will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press the button and reset the setting mode 2.
Refrigerant recovery operation method
by a refrigerant reclaimer
1 When the unit is at standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to (ON).
- The indoor units, BS units and the outdoor unit expansion
valves will fully open.
- The H1P LED is on and the remote controller indicates
(test operation) and (external control) and the
operation will be prohibited.
2 Recover the refrigerant by a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
3 Press the button and reset the setting mode 2.
14. ADDITIONAL REFRIGERANT CHARGING
METHOD
When the leak detection function is not required and the entire
refrigerant quantity can not be charged through the liquid pipe stop
valve service port with the unit not operating (refer to "Pre-charging"
on page 17), make sure to charge the remaining charging quantity
using the following procedure:
1 Turn the power of the indoor unit, the BS unit and the outdoor
unit on.
2 Make sure to open the stop valves of the suction gas pipe, the
high pressure/low pressure gas pipe and the liquid pipe
completely.
3 Connect the refrigerant charge hose to the refrigerant charging
port (for additional charging).
4 When the unit is not operating, push the button until
the additional refrigerant charging operation function A in setting
mode 2 can be defined (refer to "Setting the mode" on page 22),
the H1P LED is on (w).
5 The operation starts automatically.
The H2P LED will start flashing (
c) and the messages "Test
operation" and "Under centralized control" will display on the
remote controller.
6 After charging the specified quantity of refrigerant, press the
button to stop the operation.
The operation will stop within 30 minutes.
■ If charging is not completed after 30 minutes, set and
perform the additional refrigerant charging operation again.
■ If the additional refrigerant charging operation stops before
the passing of 30 minutes, the system may be overcharged.
7 Disconnect the refrigerant charge hose.
8 Perform "11.7. Checks after adding refrigerant" as explained on
page 20.
NOTE
Do not shut off the power and do not reset the setting
of mode 2 when vaccuuming or recovering refrigerant.
Otherwise the expansion valves will close making it
impossible to vaccuum the system or to recover the
refrigerant.
ON
BS1 MODE
ON
BS1 MODE
Never charge extra refrigerant.
BS2 SET
BS3 RETURN