Function Details
SiBE281013
48
Function and Control
3.2.30 Test Operation Control
When operating in cooling mode for the first time after installation or operating in cooling mode
by pressing the indoor unit inspection button, the unit will perform a test operation for about 3
minutes.
∗
Make sure that the initial operation after installation is performed by the cooling operation.
(Until the test run is complete, the heating operation cannot be performed.)
Even when the heating operation is performed by pressing the test run button of the indoor
unit remote controller, "Test run mode" cannot be entered.
(The heating operation is performed with forced thermo. ON.)
Note:
• In the "Test run mode", errors will be determined all at once in order to detect problems of field
setting conditions such as a case that the opening of stop valve has been forgotten.
• During the test run, if the error code shown below is displayed, take measures according to
the instructions.
(1) When the error code E3, E4 or L8 is displayed on the remote controller, there is possibility
that either the stop valve is closed or the airflow outlet is obstructed.
(2) When the error code U2 is displayed on the remote controller, check for voltage
imbalance.
(3) When the error code U4 or UF is displayed on the remote controller, check the inter unit
branch wiring connection.
(4) When the error code L4 is displayed on the remote controller, there is possibility that the
airflow passage is closed.
• When there is no error code display, cooling operation continues.
(However, this control is once again performed after refrigerant is recovered by pump down
and at the time of the first
∗
operation after the outdoor unit PCB replacement.)
&
(
• Cooling
• First operation
after installation
Cooling operation in
"Test operation mode"
for 3 minutes
Normal cooling
operation
&
(
• Cooling
• Test operation
button ON
Cooling operation in
"Test operation mode"
for 3 minutes
Cooling operation in
forced thermostat ON
&
(
• Heating
• First operation
after installation
Heating operation can
not be done.
&
(
• Heating
• Test operation
button ON
Heating operation in
forced thermostat ON.
