12
7. Test run
7.1. Before test run
►
After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power sup-
ply or control wiring, wrong polarity, and no disconnection of one phase
in the supply.
►
Use a 500-volt megohmmeter to check that the resistance between the
power supply terminals and ground is at least 1 M .
►
Do not carry out this test on the control wiring (low voltage circuit) termi-
nals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1 M .
7.2. Test run
7.2.1. Using wired remote controller.
■
Make sure to read operation manual before test run. (Especially items to secure safety)
Step 1
Turn on the power.
●
Remote controller: The system will go into startup mode, and the remote controller power lamp (green) and “PLEASE WAIT” will blink. While the lamp and message
are blinking, the remote controller cannot be operated. Wait until “PLEASE WAIT” is not displayed before operating the remote controller. After the power is turned on,
“PLEASE WAIT” will be displayed for approximately 2 minutes.
●
Indoor controller board: LED 1 will be lit up, LED 2 will be lit up (if the address is 0) or off (if the address is not 0), and LED 3 will blink.
●
Outdoor controller board: LED 1 (green) and LED 2 (red) will be lit up. (After the startup mode of the system
fi
nishes, LED 2 will be turned off.) If the outdoor controller
board uses a digital display, [- ] and [ -] will be displayed alternately every second.
If the operations do not function correctly after the procedures in step 2 and thereafter are performed, the following causes should be considered and eliminated if they
are found.
(The symptoms below occur during the test run mode. “Startup” in the table means the LED display written above.)
Symptoms in test run mode
Cause
Remote Controller Display
OUTDOOR BOARD LED Display
< > indicates digital display.
Remote controller displays “PLEASE WAIT”,
and cannot be operated.
After “startup” is displayed, only green lights up.
<00>
• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during system startup. (Normal)
After power is turned on, “PLEASE WAIT” is
displayed for 3 minutes, then error code is dis-
played.
After “startup” is displayed, green (once) and red
(once) blink alternately. <F1>
• Incorrect connection of outdoor terminal block (R, S, T and S
1
,
S
2
, S
3
.)
After “startup” is displayed, green (once) and red
(twice) blink alternately. <F3, F5, F9>
• Outdoor unit’s protection devise connector is open.
No display appears even when remote control-
ler operation switch is turned on. (Operation
lamp does not light up.)
After “startup” is displayed, green (twice) and
red (once) blink alternately. <EA. Eb>
• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S
1
, S
2
, S
3
.)
• Remote controller transmission wire short.
After “startup” is displayed, only green lights up.
<00>
• There is no outdoor unit of address 0. (Address is other than 0.)
• Remote controller transmission wire open.
Display appears but soon disappears even
when remote controller is operated.
After “startup” is displayed, only green lights up.
<00>
• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)
Step 2 Switch the remote controller to “Test run”.
1
Select “Test run” from the Service menu, and press the [SELECT] button. (Fig. 7-1)
2
Select “Test run” from the Test run menu, and press the [SELECT] button. (Fig. 7-2)
3
The test run operation starts, and the Test run operation screen is displayed.
F1
F2
F3
F4
u
n
e
m
e
c
i
v
r
e
S
r
o
s
r
u
C
:
u
n
e
m
n
i
a
M
Test run
Input maintenance info.
Function setting
Check
Self check
Fig. 7-1
F1
F2
F3
F4
Test run menu
Cursor
Service menu:
Test run
Drain pump test run
Fig. 7-2
F1
F2
F3
F4
Cool
Pipe
Auto
Switch disp.
Mode
Fan
Remain
Test run
Fig. 7-3
F1
F2
F3
F4
Remain
Vane
Fig. 7-4
Step 3 Perform the test run and check the air
fl
ow temperature and auto vane.
1
Press the [F1] button to change the operation mode. (Fig. 7-3)
Cooling mode: Check that cool air blows from the unit.
Heating mode: Check that warm air blows from the unit.
2
Press the [SELECT] button to display the Vane operation screen, and then press
the [F1] and [F2] buttons to check the auto vane. (Fig. 7-4)
Press the [RETURN] button to return to the Test run operation screen.
Step 4 Con
fi
rm the operation of the outdoor unit fan.
The speed of the outdoor unit fan is controlled in order to control the performance of the unit. Depending on the ambient air, the fan will rotate at a slow speed and will
keep rotating at that speed unless the performance is insuf
fi
cient. Therefore, the outdoor wind may cause the fan to stop rotating or to rotate in the opposite direction, but
this is not a problem.
