Mitsumi electronic PKA-A12HA4, PKA-A18HA4 service manual Output pattern B

•Refer to the following tables for details on the check codes. [Output pattern A]

Beeper sounds Beep

Beep

Beep

Beep

Beep

Beep

Beep

OPERATION

1st

2nd

3rd

nth

1st

2nd · · · Repeated

INDICATOR

lamp blink

Off

On

On

On

On

Off

On

On

pattern

Self-checkApprox. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.

0.5 sec. Approx. 2.5 sec. 0.5 sec.

0.5 sec.

starts

(Start signal

Number of blinks/beeps in pattern indicates the check

Number of blinks/beeps in pattern indicates

received)

code in the following table (i.e., n=5 for “P5”)

the check code in the following table

[Output pattern B]

Beeper sounds Beep
OPERATION
INDICATOR
lamp blink
		Off
pattern	Self-check	Approx. 2.5 sec.

starts (Start signal received)

Beep

Beep

Beep

Beep

Beep

Beep

1st

2nd

3rd

nth

1st

2nd · · · Repeated

On

On

On

On

On

Off

On

On

On

Approx. 3 sec.

0.5 sec. 0.5 sec. 0.5 sec.

0.5 sec.

Approx. 2.5 sec.

Approx. 3 sec.

0.5 sec.

0.5 sec.

Number of blinks/beeps in pattern indicates the check

Number of blinks/beeps in pattern indicates

code in the following table (i.e., n=5 for “U2”)

the check code in the following table

[Output pattern A] Errors detected by indoor unit

IR wireless remote controller	Wired remote controller
Beeper sounds/OPERATION		Symptom	Remark
INDICATOR lamp blinks	Check code
(Number of times)
1	P1	Intake sensor error
2	P2	Pipe (TH2) sensor error
	P9	Pipe (TH5) sensor error
3	E6,E7	Indoor/outdoor unit communication error
4	P4	Float switch connector (CN4F) open
5	P5	Drain pump error
	PA	Forced compressor stop(due to water leakage abnormality)
6	P6	Freezing/Overheating protection operation
7	EE	Communication error between indoor and outdoor units
8	P8	Pipe temperature error
9	E4, E5	Remote controller signal receiving error
10	–	–
11	–	–
12	Fb	Indoor unit control system error (memory error, etc.)
–	E0, E3	Remote controller transmission error
–	E1, E2	Remote controller control board error

[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)

IR wireless remote controller	Wired remote controller
Beeper sounds/OPERATION		Symptom	Remark
INDICATOR lamp blinks	Check code
(Number of times)
1	E9	Indoor/outdoor unit communication error
		(Transmitting error) (Outdoor unit)
2	UP	Compressor overcurrent interruption
3	U3,U4	Open/short of outdoor unit thermistors	For details, check
4	UF	Compressor overcurrent interruption (When compressor locked)
			the LED display
		Abnormal high discharging temperature/49C operated/
5	U2		of the outdoor
		insufficient refrigerant
			controller board.
		Abnormal high pressure (63H operated)/Overheating
6	U1,Ud		As for outdoor
		protection operation
			unit, refer to
7	U5	Abnormal temperature of heatsink
			outdoor unit's
8	U8	Outdoor unit fan protection stop	service manual.
9	U6	Compressor overcurrent interruption/Abnormal of power module
10	U7	Abnormality of superheat 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 received, the specified refrigerant address is incorrect.

14