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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 control-
ling DIP SW2 on ‘A-Control Service Tool’.
SW2 setting
Display detail
Explanation for display Unit
Operation indicator SW2 : Indicator change of self diagnosis
<Digital indicator LED1 working details>
(Be sure the 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.
(Initial setting)
SW2
LED1
(Lighting)
(2) When the display lights. (Normal operation)
1Operation mode display.
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 co-
mpressor stops due to the work of protecti-
on device.
Postponement code is displayed while error
is being postponed.
wC5 is displayed during replacement opera-
tion. <RP4~6VHA only>
(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)
Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)
Mis-wiring 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
3
Outdoor unit
Indoor unit 1
Indoor unit 2
Indoor unit 3
Display
Contents to be inspected (During operation)
U1
U2
U3
U4
U5
U6
U7
UF
UH
UL
UP
P1~P8
A0~A7
Abnormal high pressure (63H worked)
Abnormal high discharging temperature, shortage of refrigerant
Open/short circuit of discharging thermistor(TH4)
Open/short of outdoor unit thermistors(TH3, TH6, TH7 and TH8)
Abnormal temperature of heat sink
Abnormality of power module
Abnormality of super heat due to low discharge temperature
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure (63L worked)
Compressor overcurrent interruption
Abnormality of indoor units
Communication error of high-prior signal (M-NET)
OC294--2.qxp 03.6.9 7:37 PM Page 53
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