17
7. Test run
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller
Wired remote
controller
Symptom
Remark
Beeper sounds/OPERATION
INDICATOR lamp blinks
(Number of times)
Check code
1
E9
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
For details, check the LED
display of the outdoor controller
board.
2
UP
Compressor overcurrent interruption
3
U3, U4
Open/short of outdoor unit thermistors
4
UF
Compressor overcurrent interruption (When compressor locked)
5
U2
Abnormal high discharging temperature/49C worked/insufficient refrigerant
6
U1, Ud
Abnormal high pressure (63H worked)/Overheating protection operation
7
U5
Abnormal temperature of heat sink
8
U8
Outdoor unit fan protection stop
9
U6
Compressor overcurrent interruption/Abnormal of power module
10
U7
Abnormality of super heat due to low discharge temperature
11
U9, UH
Abnormality such as overvoltage or voltage shortage and abnormal synchro-
nous signal to main circuit/Current sensor error
12
—
—
13
—
—
14
Others
Other errors (Refer to the technical manual for the outdoor unit.)
*1 If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come
on, there are no error records.
*2 If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm the self-check start signal was received, the
specified refrigerant address is incorrect.
• On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
• On wired remote controller
Check code displayed in the LCD.
• If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Symptom
Cause
Wired remote controller
LED 1, 2 (PCB in outdoor unit)
Please Wait
For about 3 minutes
after power-on
After LED 1, 2 are lighted, LED 2 is turned
off, then only LED 1 is lighted. (Correct
operation)
• For about 3 minutes after power-on, operation of the remote
controller is not possible due to system start-up. (Correct
operation)
Please Wait
→
Error code
Subsequent to
about 3 minutes
after power-on
Only LED 1 is lighted.
→
LED 1, 2 blink.
• Connector for the outdoor unit’s protection device is not con-
nected.
Reverse or open phase wiring for the outdoor unit’s power
terminal block (L1, L2, L3)
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
Only LED 1 is lighted.
→
LED 1 blinks
twice, LED 2 blinks once.
• Incorrect wiring between indoor and outdoor units (incorrect
polarity of S1, S2, S3)
• Remote controller wire short
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller are accepted.
• Operation lamp is blinking.
• The buzzer makes a short ping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED 1, 2, 3) provided on the indoor controller, refer to page 15.
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