Mitsubishi Electronics PUZ-A30NHA2-BS, PUZ-A42NHA2-BS, PUY-A36NHA2, PUZ-A18NHA2-BS U9,UH

Remark

Number of blinks/beeps in pattern indicates the check code in the following table

Remark

•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-check

Approx. 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
		1st		2nd		3rd		nth
On		On		On		On		On		Off
Approx. 3 sec.	0.5 sec. 0.5 sec. 0.5 sec.						0.5 sec.		Approx. 2.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

	Beep		Beep
		1st	2nd · · · Repeated
On		On	On
Approx. 3 sec.	0.5 sec.		0.5 sec.

[Output pattern A] Errors detected by indoor unit

Wireless remote controller	Wired remote controller
Beeper sounds/OPERATION		Symptom
INDICATOR lamp blinks	1 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	Drain sensor error / Float switch connector open
5	P5	Drain pump error	As for indoor
	PA	Forced compressor stop(due to water leakage abnormality)
			unit, refer to
6	P6	Freezing/ Overheating protection operation
			indoor unit's
7	EE	Communication error between indoor and outdoor units
			service manual.
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.)
Wireless remote controller	Wired remote controller
Beeper sounds/OPERATION		Symptom
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
4	UF	Compressor overcurrent interruption (When compressor locked)
5	U2	Abnormal high discharging temperature/ insufficient refrigerant	For details, check
		Abnormal high pressure (63H worked)/ Overheating
6	U1,Ud		the LED display
		protection operation
			of the outdoor
7	U5	Abnormal temperature of heatsink
			controller board.
8	U8	Outdoor unit fan protection stop
9	U6	Compressor overcurrent interruption/Abnormal of power module
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

*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.

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