Mitsubishi Electric Mr. slim PCA-A-KA7 Série Manuel D'installation page 11

7. Test run
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
IR wireless remote controller
RF thermostat
Beeper sounds/OPERATION
INDICATOR lamp blinks
(Number of times)
1 E9
2 UP
3 U3, U4
4 UF
5 U2
6 U1, Ud
7 U5
8 U8
9 U6
10 U7
11 U9, UH
12 —
13 —
14 Others
*1. If the beeper does not sound again after the initial  beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does
not come on, there are no error records.
*. If the beeper sounds 3 times continuously "beep, beep, beep (0.4 + 0.4 + 0.4 sec.)" after the initial  beeps to confirm the self-check start signal was re-
ceived, the specified refrigerant address is incorrect.
• On IR 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.
Wired remote controller
PLEASE WAIT
PLEASE WAIT → Error code
Display messages do not appear
even when operation switch is
turned ON
(operation lamp does not light up).
On the IR 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 (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED 1 (power for microcomputer)
LED 2 (power for remote controller)
LED 3 (communication between indoor and outdoor units)
Wired remote
controller
Check code
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating protection operation
Abnormal temperature of heat sink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
—
—
Other errors (Refer to the technical manual for the outdoor unit.)
Symptom
LED 1, 2 (PCB in outdoor unit
After LED 1, 2 are lighted, LED 2 is turned
For about 2 minutes
off, then only LED 1 is lighted. (Correct
after power-on
operation)
Only LED 1 is lighted. → LED 1, 2 blink.
Subsequent to about
2 minutes after
power-on
Only LED 1 is lighted. → LED 1 blinks
twice, LED 2 blinks once.
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address "0".
Indicates state of communication between the indoor and outdoor units. Make sure that this LED
is always blinking.
Symptom
•For about 2 minutes after power-on, operation of the remote
controller is not possible due to system start-up. (Correct
operation)
•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, GR)
•Incorrect wiring between indoor and outdoor units (incorrect
polarity of S1, S2, S3)
•Remote controller wire short
Remark
For details, check the LED
display of the outdoor controller
board.
Cause
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