Mitsubishi Electric Mr.Slim PCA-A-KA4, Installation Manual

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11
7. Test run
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
IR wireless remote controller
Wired remote
controller
RF thermostat
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
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 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 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.
Symptom
Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit
PLEASE WAIT
For about 2 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 2 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
2 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, GR)
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 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) 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) Indicates state of communication between the indoor and outdoor units. Make sure that this LED
is always blinking.