Daikin RXSQ24TAVJU Service Manual page 146

Test Operation
Caution
Power supply has been turned on for outdoor unit, be careful to avoid electric shock.
• Set the push buttons (BS1 ~ 5) after making sure the service monitoring lamp has been ON.
• For setting method, see the "Service Precautions" label attached to the front panel of the outdoor unit.
(Be sure to keep a record of the setting items to the "Service Precautions" label.)
• Don't touch the changeover switches (DS1-1) while setting them. Doing so may result in malfunction.
(4) • Check whether the gas side and liquid side stop valves have been opened. Open them if they are closed.
Caution
Operation with the stop valve closed may result in compressor malfunction.
(5) Press TEST (BS4) button for 5 seconds or more to perform test operation.
See About test operation on the "Service Precautions" label for details.
• Ask other installers to perform test operation or attach the front panel before having to leave the outdoor unit
working alone.
• Test operation is automatically stopped after about 30 minutes (maximum 1 hour) operation. (Perform
checks of fault wiring, closed stop valves & refrigerant charging and auto determination of piping length)
• After test operation is completed, if there is no error code on the display of the remote controller, the unit can
perform normal operation 3 minutes later.
• The display of the remote controller indicates symbol of test operation during this operation.
(6) Be sure to attach the front panel of the outdoor unit after test operation is completed.
About test operation
If the system is started about 12 minutes after the indoor and outdoor units are opened or later, the
compressor will not operate and H2P will light up.
Before operating, always check whether the symbols indicated on the LED display are those in the table
under "1. Powering on ~ test operation (2)".
In order to ensure uniform refrigerant distribution, it may take up to around 10 minutes for the compressor to
start up after the unit starting operation. This is not a malfunction.
The operation check is not for checking individual indoor units. After completing the operation check, operate
the system normally with the remote controller.
Test operation can't be performed when the unit is in other modes such as refrigerant recycling mode.
Never perform test operation with discharge pipe thermistor (R2T), suction pipe thermistor (R3T) and
pressure sensor (S1NPH, S1NPL) removed. Failure to do so will result in compressor damage.
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SiUS331708EA
Field Settings and Test Operation