Daikin VRV III REMQ72PBYD Engineering Data page 110

Installation
[Remote controller heating mode malfunction code]
Code The work contents
Close the valve A immediately and push the TEST button (BS4)
P8 once. And restart from procedure (7) of "In case of heating
mode".
Operation is interrupted. Close the valve A immediately and
check the below items.
• Check if HP/LP gas pipe, suction gas pipe or liquid
pipe shutoff valve is opened.
P2
• Check the refrigerant tank is connected and the valve
A was opened.
• Check if the air inlet and outlet of the indoor unit are
not closed by an obstruction.
6.
After completing the additional refrigerant charging, record the
charging amount on the accessory "REQUEST FOR THE
INDICATION" label (Installation records) and adhere it to the back
side of the front panel.
11-2-2 Procedure of check operation
• Check operation perform the following work. Do the check
operation following below.
Otherwise, malfunction code "U3" will be displayed in the remote
controller and normal operation can not be carried out.
 Check of shutoff valve opening
 Check of miswiring
 Judgment of piping length
 Check of refrigerant overcharge
NOTE
• Check operation can not carried out at outdoor temp. less than 23°F.
Perform the check operation at day or time that outdoor temp. is
23°F or more.
[Check Operation Procedure]
(1) Close the electrical components box lid and all front panels except
as the side of the electrical components box and turn on the power
to the outdoor unit and all connected Branch Selector and 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.)
(2) 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 Onsite Settings")
(3) Perform the check operation following the Check Operation Method
of the [Service Precautions] label (lower) on the electrical
components box lid. (See figure 32) The system operation for about
40~60 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.
(Refer to figure 32)
1. Electrical components box (1) lid
2. (Only REYQ~PYDN)
Electrical components box (2) lid
3. [Service Precaution] label (upper)
4. [Service Precaution] label (lower)
NOTE
For interrupting the check operation, push RETURN button (BS3).
110
[Remote controller displays malfunction code]
Malfunction
Installation error
code
E3, E4
The shutoff valve of the
F3, F6
outdoor unit is left closed.
UF
The phases of the power to
U1
the outdoor unit is reversed.
No power is supplied to an
U1
outdoor, Branch Selector
U4
or indoor unit (including
LC
phase interruption).
There is conflict on the
UF connection of transmission
wiring in the system.
E3
F6 Refrigerant overcharge.
UF
E4
Insufficient refrigerant.
F3
Field wiring is connected to
"TO MULTI UNIT (Q1,Q2)"
U7, U4
terminal on the outdoor unit
UF, UH
PC-board (A1P) when the
system is one outdoor system.
NOTE
If any malfunction codes other than the above are displayed, check
the service manual for how to respond.
12. ONSITE SETTINGS
NOTE
In the case of a multi system, all onsite settings should be made on
the master unit. Settings made on sub units are invalid.
The outdoor unit to which the indoor unit transmission wire are
connected is the master unit, and all other units are sub units.
Use the push button switches (BS1 through BS5) on the outdoor unit
PC-board (A1P) to make the necessary onsite settings.
See the "Service Precautions" label (upper) on the electrical
components box lid for details on the positions and operating method
of the push button switches and on the onsite setting.
Make sure to record the setting on the accessory "REQUEST FOR
THE INDICATION" label.
WARNING Electric Shock Warning
Use an insulated rod to operate the push buttons via the inspection
door of electrical components box lid.
There is a risk of electric shock if you touch any live parts, since this
operation must be performed with the power on.
EDUS391004-N
Remedial action
Open the shutoff valve.
Exchange two of the three phases (L1,
L2, L3) to make a proper connection.
Make sure the power source wire is
properly connected to the outdoor,
Branch Selector or indoor unit and
revise if necessary.
Check if the refrigerant piping line and
the transmission wiring are consistent
with each other.
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.
• Check if the additional refrigerant
charge has been finished correctly.
• Recalculate the additional amount
refrigerant from the piping length and
add the adequate amount.
Remove the line from the "TO MULTI
UNIT (Q1, Q2)" terminal.
3P215731-11R
Installation of Outdoor Units