Daikin RTSQ20PY1 Service Manual page 209

SiBE31-801_C
5. After the completion of service, reinstall the junction connectors to the outdoor unit fans.
1.2.4 Precautions for Field Settings
<Independent systems>
<Systems with multi outdoor units>
[Discrimination between master unit and slave unit]
1. An outdoor unit to which the indoor unit connection wiring is connected is a master unit, and
2. The outdoor units can be discriminated as shown in the table on the upper right according to
1.2.5 Precautions for Piping Work and Refrigerant Charging
This unit uses R-410A refrigerant. Pay careful attention to the precautions shown below.
1. Use a charge hose and a gauge manifold dedicated to R-410A to withstand pressure and
2. To blaze, be sure to blow nitrogen gas through the piping.
1.2.6 Precautions for Operation in Service Mode (Field Setting)
In order to restart service mode for test operation after interrupting or normal completion of the
service mode, provide intervals of not less than one minute. If the service mode is restarted at
no intervals of time, any of the malfunction indicating LEDs on the outdoor unit PCB may turn
ON. In this case, press the RETURN button (BS3). If the LED is still kept ON, reset the power
supply.
Troubleshooting
The malfunction code "E7" is displayed on the remote controller to disable normal
operation.
To connect the connectors, refer to information in Section " 2 Wiring Diagrams".
Multiple
meter
Make various settings with the switch box located on the front right side.
Make various settings with the switch box of the master outdoor unit.
(Settings with slave unit are invalidated.)
Master
Slave 1
Slave 2
other outdoor units are a slave unit.
LED displays on the outdoor unit PCB (A1P).
prevent impurities (e.g. SUNISO oil) from getting mixed in the refrigerant.
Conduct airtight tests and vacuum drying without fail. (Airtight testing pressure: 4.0MPa)
Charge refrigerant in a liquid state.
k: ON l: BLINK h:OFF
LED indication and location
H1P H2P H3P H4P H5P H6P H7P H8P
h h k h h
h h h h h
h h h h h
Check Items for Service
h h k
h h l
h h h
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