Daikin RXYQ28PY1 [284/487] 7 7 4 7 7 7 7 4

Daikin RXYQ28PY1 [284/487] 7 7 4 7 7 7 7 4
Additional Refrigerant Charge and Check Operation ED34-645B
676 Installation of Outdoor Units
[Check Operation Procedure]
(1) Make the onsite setting as needed using the dip switches on the outdoor unit PC-board (A1P) with the power off
(See “12-1 Onsite Settings With the Power Off”)
(2) Close the EL. COMPO. BOX lid and all front panels except as the side of the EL. COMPO. BOX and turn on the
power to the outdoor unit and all connected indoor units. (Be sure to turn the power on at least 6 hours before
operation in order to have power running to the crank case heater.)
(3) Check the LED display on the outdoor unit PC-board (A1P) is as shown in the table below and transmission is
normal.
LED display:
7
...OFF,
4
...ON,
5
...Blinking
(*)How to distinguish the master unit, sub unit 1, and sub unit 2 in the multi system.
Method 1: By the H8P (MULTI) LED display
Method 2: By the transmission wiring to indoor unit
(4) Make the onsite settings as needed using the push button (BS1-BS5) on the outdoor unit PC-board (A1P) with the
power on. (See “12-2 Onsite Settings With the Power On”)
(5) Perform the check operation following the Check Operation Method of the [Service Precautions] label on the EL.
COMPO. BOX lid. The system operation for about 40 minutes and automatically stops the check operation.
If the malfunction code is not displayed in the remote controller after the system stop, check operation is
completed. Normal operation will be possible after 5 minutes. If the malfunction code is displayed in the remote
controller, correct the malfunction following [Remote controller displays malfunction code] and perform the check
operation again.
[Remote controller displays malfunction code]
If any malfunction codes other than the above are displayed, check the service manual for how to respond.
LED display
(Default status of shipped)
SERV.
MONI-
TOR
MODE
TEST/
HWL
C/H SELECTOR
L.N.O.P
DEMA-
ND
MULTI
IND
MASTE
R
SLAVE
HAP H1P H2P H3P H4P H5P H6P H7P H8P
Single system
577477777
Multi system(*)
Master unit
577477774
Sub unit 1
577777775
Sub unit 2
577777777
4
(ON): Master unit
5
(Blinking): Sub unit 1
7
(OFF): Sub unit 2
Transmission wiring is connected: Master unit
Transmission wiring is not connected : Sub unit 1 or Sub unit 2
Malfunction code Installation error Remedial action
E3, E4
F3, F6
UF
The shutoff valve of the outdoor unit is left
closed.
Open the shutoff valve.
U1
The phases of the power to the outdoor unit is
reversed.
Exchange two of the three phases (L1, L2, L3) to make a
proper connection.
U1
U4
LC
No power is supplied to an outdoor or indoor
unit (including phase interruption).
Make sure the power source wire is properly connected to the
outdoor unit and revise if necessary.
UF
There is conflict on the connection of
transmission wiring in the system.
Check if the refrigerant piping line and the transmission
wiring are consistent with each other.
E3
F6
UF
Refrigerant overcharge.
Recalculate the additional amount refrigerant from the piping
length and correct the refrigerant charge level by recovering
any excessive refrigerant with a refrigerant recovery
machine.
E4
F3
Insufficient refrigerant.
Check if the additional refrigerant charge has been
finished correctly.
Recalculate the additional amount refrigerant from the
piping length and add the adequate amount.
U7, U4
UF, UH
If the outdoor unit terminal is connected when
there is one outdoor unit installed.
Remove the line from the outdoor multi terminals (Q1 and
Q2).

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