Operation indicator

[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Control Service Tool’.

SW2 : Indicator change of self diagnosis

SW2 setting

Display detail

Explanation for display

Unit

1 2 3 4 5 6

<Digital indicator LED1 working details>

(Be sure that 1 to 6 in the SW2 are set to OFF.)

(1)Display when the power supply ON.

When the power supply ON, blinking displays by turns. Wait for 4 minutes at the longest.

(2)When the display lights. (Normal operation) 1Operation mode display

1second interval

(Lighting)

LED1

SW2

1 2 3 4 5 6

(Initial setting)

The tens digit : Operation mode

Display	Operation Model
O	OFF / FAN
C	COOLING / DRY w

HHEATING

dDEFROSTING

2Display during error postponement Postponement code is displayed when compressor stops due to the work of protection device.

Postponement code is displayed while error is being postponed.

The ones digit : Relay output

Display	Warming-up	Compressor	4-way valve	Solenoid valve
Display	Compressor	Compressor	4-way valve	Solenoid valve
	Compressor


0	—	—	—	—
1	—	—	—	ON

2	—	—	ON	—

3	—	—	ON	ON

4	—	ON	—	—

5	—	ON	—	ON

6	—	ON	ON	—

7	—	ON	ON	ON

8	ON	—	—	—

A	ON	—	ON	—

(3) When the display blinks

Inspection code is displayed when compressor stops due to the work of protection devices.

Display Inspection unit

0Outdoor unit

1Indoor unit 1

2Indoor unit 2

Display	Contents to be inspected (During operation)

U1	Abnormal high pressure (63H worked)
U2	Abnormal high discharging temperature, shortage of refrigerant
U3	Open/short circuit of discharge thermistor (TH4)
U4	Open/short of outdoor unit thermistors (TH3, TH6, TH7 and TH8)
U5	Abnormal temperature of heatsink
U6	Abnormality of power module
U8	Abnormality in outdoor fan motor.

UF	Compressor overcurrent interruption (When Comp. locked)
UH	Current sensor error
UL	Abnormal low pressure (63L worked)

UP	Compressor overcurrent interruption
P1~P8	Abnormality of indoor units

A0~A7	Communication error of M-NET system

Display	Contents to be inspected (When power is turned on)

F3	63L connector(red) is open.
F5	63H connector(yellow) is open.
F9	2 connectors (63H/63L) are open.
E8	Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
E9	Indoor/outdoor communication error (Transmitting error) (Outdoor unit)
EA	Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)

Eb	Miswiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)

EC	Startup time over

E0~E7	Communication error except for outdoor unit