Emergency Operation - Daikin VRV II RXYQ5MATL Service Manual

Other Control
5.2

Emergency Operation

If the compressor cannot operate, this control inhibits any applicable compressor or outdoor unit
from operating to perform emergency operation only with the operative compressor or outdoor
unit.
Caution
In order to disable the compressor operation due to a failure or else, be sure to do so
in emergency operation mode.
NEVER attempt to disconnect power supply wires from magnetic contactors or else.
(Doing so will operate compressors in combination that disables oil equalization
between the compressors, thus resulting in malfunctions of other normal
compressors.)
5.2.1 Restrictions for Emergency Operation
• In the case of system with 1 outdoor unit installed, only when thermostats of indoor units
having a capacity of 50% or more of the outdoor unit capacity turn ON, the emergency
operation is functional. (If the total capacity of indoor units with thermostat ON is small, the
outdoor unit cannot operate.)
• If the emergency operation is set while the outdoor unit is in operation, the outdoor unit stops
once after pump-down residual operation (a maximum of 5 minutes elapsed).
5.2.2 In the Case of 1-Outdoor-Unit System (RXYQ8MA to 16MA)
[Set the system to operation prohibition mode by compressor]
• In order to set an INV compressor to operation
prohibition mode, set No. 42 of Setting mode 2 to

"EMERGENCY OPERATION".

• In order to set STD1 and STD2 compressors to
operation prohibition mode, set No. 19 of Setting
mode 2 to "STD1, 2 OPERATION PROHIBITION".
(RXYQ8MA to 16MA)
• In order to set the STD 2 compressor to operation
prohibition mode, set No. 19 of Setting mode 2 to "STD2
OPERATION PROHIBITION".(RXYQ14MA, 16MA)
• For RXYQ14MA and 16MA, if the INV compressor
is set to operation prohibition mode, only a single STD compressor will operate for the
92
(Procedure)
(1) Press and hold the MODE button (BS1) for a
period of 5 seconds or more.
(2) Press the SET button (BS2) 42 times.
(3) Press the RETURN button (BS3) once.
(4) Press the SET button (BS2) once.
(5) Press the RETURN button (BS3) twice.
(6) Press the MODE button (BS1) once.
(Procedure)
(1) Press and hold the MODE button (BS1) for a
period of 5 seconds or more.
(2) Press the SET button (BS2) 19 times.
(3) Press the RETURN button (BS3) once.
(4) Press the SET button (BS2) once.
(5) Press the RETURN button (BS3) twice.
(6) Press the MODE button (BS1) once.
(Procedure)
(1) Press and hold the MODE button (BS1) for a period
of 5 seconds or more.
(2) Press the SET button (BS2) 19 times.
(3) Press the RETURN button (BS3) once.
(4) Press the SET button (BS2) twice.
(5) Press the RETURN button (BS3) twice.
(6) Press the MODE button (BS1) once.
LED display (7:ON :OFF
7 7
H1P----H7P
7777777 777777
777 7 77 7 77 7
(Factory set)
77777 77777 7 9
9
7777 7777 7 7 7
7777777 777777
7777777 77 7777
LED display (7:ON :OFF
7 7
H1P----H7P
7777777 777777
77 7 777 7777
(Factory set)
7777777 777777
9
77777 7777 7 7
7777777 777777
7777777 77 7777
LED display (7:ON :OFF
7 7
H1P----H7P
7777777 777777
77 7 777 7777
(Factory set)
7777777 777777
9
77777 7777 7 7
7777777 777777
7777777 77 7777
Si39-504
:Blink)
9
:Blink)
9
:Blink)
9
Function