Mitsubishi Electric Mr.Slim PLA-A-EA7 Installation Manual page 13

7. Test run
Step 4 Confirm 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 insufficient. Therefore, the outdoor wind may cause the fan to stop rotating or to rotate in the opposite direction, but this is
not a problem.
Step 5 Stop the test run.
1 Press the [ON/OFF] button to stop the test run. (The Test run menu will appear.)
Note: If an error is displayed on the remote controller, see the table below.
LCD Description of malfunction
P1 Intake sensor error
P2 Pipe sensor error (liquid pipe)
Drain float switch connector
P4
disconnected (CN4F)
P5 Drain overflow protection operation
Freezing/overheating protection
P6
operation
P8 Pipe temperature error
See the table below for the details of the LED display (LED 1, 2, and 3) on the indoor controller board.
LED1 (microcomputer power supply)
LED2 (remote controller power supply)
LED3 (indoor/outdoor unit communication)
Note:
If the unit is operated continuously during a test run, the unit stops after 2 hours.
7.3. Self-check
■ Refer to the installation manual that comes with each remote controller for details.
• Refer to the following tables for details on the check codes. (Wireless remote controller)
[Output pattern A]
Beeper sounds Beep
OPERATION
INDICATOR
lamp blinking
Off
pattern
Approx. 2.5 sec.
Self-check
starts
(Start signal
Number of blinks/beeps in pattern indicates the check
received)
code in the following table (i.e., n=5 for "P5")
[Output pattern B]
Beeper sounds Beep
OPERATION
INDICATOR
lamp blinking
Off
pattern
Approx. 2.5 sec.
Self-check
starts
(Start signal
received)
LCD
P9
PA
PB (Pb)
PL
FB
U*, F*
(* indicates an
alphanumeric
character
excluding FB.)
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the wired remote controller. The LED is lit only for the indoor unit that is connected
to the outdoor unit that has an address of 0.
Indicates whether the indoor and outdoor units are communicating. Make sure that this LED is always blinking.
Beep Beep Beep Beep
1 2 3 n
st nd rd th
On On On
On
0.5 sec. 0.5 sec. 0.5 sec.
0.5 sec.
Beep Beep
1 st 2 nd
On On On
Approx. 3 sec. 0.5 sec. 0.5 sec.
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for "U2")
Description of malfunction
Pipe sensor error (dual-wall pipe)
Leakage error (refrigerant system)
Indoor unit fan motor error
Refrigerant circuit abnormal
Indoor controller board error
Outdoor unit malfunction
Refer to the wiring diagram for the
outdoor unit.
Beep Beep
1 2 · · · Repeated
st nd
Off On On
Approx. 2.5 sec. 0.5 sec. 0.5 sec.
Number of blinks/beeps in pattern indicates
the check code in the following table
Beep Beep
3 rd n th
On On Off
0.5 sec. 0.5 sec. Approx. 2.5 sec.
LCD Description of malfunction
Communication error between the
E0 – E5 remote controller and the indoor
unit
Communication error between the
E6 – EF
indoor unit and the outdoor unit
Beep Beep
1 st 2 nd · · · Repeated
On On On
Approx. 3 sec. 0.5 sec. 0.5 sec.
Number of blinks/beeps in pattern indicates
the check code in the following table
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