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<Outdoor unit operation monitor function>
[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 setting
1
ON
23456
Display detail
Explanation for display Unit
Operation indicator SW2 : Indicator change of self diagnosis
<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
1
ON
23456
(Initial setting)
SW2
1 second
interval
LED1
(Lighting)
Display Operation Model
The tens digit : Operation mode
The ones digit : Relay output
O
C
H
d
Display
0
1
2
3
4
5
6
7
8
A
Compressor
Warming-up
Compressor
4-way valve
Solenoid valve
—
—
—
—
ON
ON
ON
ON
—
—
—
—
—
—
—
—
—
—
ON
ON
—
—
ON
ON
—
—
ON
ON
—
ON
—
ON
—
ON
—
ON
—
ON
—
—
OFF / FAN
COOLING / DRY w
HEATING
DEFROSTING
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.
(3) When the display blinks
Inspection code is displayed when compressor stops due to the work of protection devices.
Display
Contents to be inspected (When power is turned on)
F3
F5
F9
E8
E9
EA
Eb
EC
E0~E7
63L connector(red) is open.
63H connector(yellow) is open.
2 connectors (63H/63L) are open.
Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
Indoor/outdoor communication error (Transmitting error) (Outdoor unit)
Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)
Startup time over
Communication error except for outdoor unit
Display
Inspection unit
0
1
2
Outdoor unit
Indoor unit 1
Indoor unit 2
Display
Contents to be inspected (During operation)
U1
U2
U3
U4
U5
U6
U8
UF
UH
UL
UP
P1~P8
A0~A7
Abnormal high pressure (63H worked)
Abnormal high discharging temperature, shortage of refrigerant
Open/short circuit of discharge thermistor (TH4)
Open/short of outdoor unit thermistors (TH3, TH6, TH7 and TH8)
Abnormal temperature of heatsink
Abnormality of power module
Abnormality in outdoor fan motor.
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure (63L worked)
Compressor overcurrent interruption
Abnormality of indoor units
Communication error of M-NET system
OCH429--3.qxp 07.11.20 9:19 AM Page 76