Mitsubishi Electric Mr. SLIM PKA-A HA Series Installation Manual page 13

7. Test run
[Output pattern B[ Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
Wired remote
controller
Check code
Symptom
Remark
E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP Compressor overcurrent interruption
U3, U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1, Ud Abnormal high pressure (63H worked)/Overheating safeguard operation
U5 Abnormal temperature of heat sink For details, check the LED
U8 Outdoor unit fan safeguard stop display of the outdoor controller
U6 Compressor overcurrent interruption/Abnormal of power module board.
U7 Abnormality of super heat due to low discharge temperature
U9, UH Abnormality such as overvoltage or voltage shortage and abnormal
synchronous 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 two 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 three times continuously "beep, beep, beep (0.4 + 0.4 + 0.4 sec.) '_after the initial two 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 the above test run has been performed, refer to the following table to remove the cause.
Symptom
Wired remote controller
For about 2
PLEASE WAIT minutes following
power-on
PLEASE WAIT _ Error code After about 2
minutes has
expired following
Display messages do not appear even
power-on
when operation switch is turned ON
(operation lamp does not light up).
On the wireless remote controller with condition above, following phenomena takes place.
• No signals from the remote controller are accepted.
• OPE lamp is blinking.
• The buzzer makes a short pipng sound.
LED 1,2 (PCB in outdoor unit)
After LED 1,2 are lighted, LED 2 is turned off,
then only LED 1 is lighted. (Correct operation)
Only LED 1 is lighted. _ LED 1,2 blink.
Only LED 1 is lighted. _ LED 1 blinks twice,
LED 2 blinks once.
Cause
For about 2 minutes following 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
connected.
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 Sl, $2, $3)
Remote controller wire short
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 the following table.
LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit.
LED 2 (power for remote controller) 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".
LED 3 (communication between indoor and outdoor units only A-control) Indicates state of communication between the indoor and outdoor units. Make sure that this
LED is always blinking.
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