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SiAF332111E
Test Operation (4/5/10/12 HP Models)
Part 5 Field Settings and Test Operation
167
Caution
Caution
with the BS buttons (BS1~3) on outdoor unit PCB (A1P).
(See the
Service Precautions
label for details)
Power supply has been turned ON for outdoor unit, be careful to avoid electric shock.
Set the BS buttons (BS1~3) after making sure the microcomputer normal 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.)
(6) Check whether the gas side and liquid side stop valves have been opened. Open them if
they are closed.
Operation with the stop valve closed may result in compressor error.
(7) Perform test operation based on the
Service Precautions
label attached to the front panel.
The air conditioning system will automatically stop after about 40 minutes of operation. If there
is no error code on the remote controller display, test operation is complete. The unit may
perform normal operation after 5 minutes.
(8) Be sure to attach the front panel of the outdoor unit after test operation is completed.
About test operation
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 error.
Be sure to perform error check for all indoor units. After completing test operation, operate
the system normally with the remote controller.
Test operation cannot be performed when the unit is in other modes such as refrigerant
recycling mode.
Never perform test operation with suction pipe thermistor (R3T), discharge pipe thermistor
(R21T) and pressure sensor (S1NPH, S1NPL) removed. Failure to do so will result in
compressor damage.
For normal operation
Set the master unit
For wired remote controller
After test operation is completed, the symbol
MASTER CONTROLLED
blinks on all remote
controllers connected here.
Set the master unit as per customer's request.
(It is recommended to set the indoor unit with highest frequency of use as the master unit.)
Press the operation mode changeover button on the remote controller of the master unit.
Conduct cool/heat changeover with this remote controller and the symbol
MASTER
CONTROLLED
vanishes.
For other remote controllers excluding the above, the symbol
MASTER CONTROLLED
lights up.
For wireless remote controller
After test operation is completed, timer lamps blink on all indoor units connected here.
Set the master unit as customer's request.
(It is recommended to set the indoor unit with highest frequency of use as the master unit.)
Press the operation mode changeover button on the remote controller of the master unit.
Then a sound of beeps can be heard and the timer lamps on all indoor units go out.
For details, refer to the installation manual included with the indoor unit.
After test operation is completed, operate the unit normally.
(1) Check the indoor and outdoor units are in normal operation.
(If a knocking sound produced by liquid compression of the compressor can be heard, stop the
unit immediately. Operate again after powering up the crankcase heater completely.)
(2) Operate each indoor unit one by one and check the corresponding outdoor unit is also in
operation.
(3) Check to see if cold (or hot) air is coming out from the indoor unit.
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