39
<Outdoor unit operation monitor function>
[When optional 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
2 3 4 5 6
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)
1
Operation mode display.
1
ON
2 3 4 5 6
(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
+
HEATING
DEFROSTING
2
Display 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.
w
C5 is displayed during replacement operation.
(3) When the display blinks
Inspection code is displayed when compressor stops due to the work of protection devices.
Display
Inspection unit
0
Outdoor unit
1
Interface or FTC
Display
Contents to be inspected (During operation)
U1
Abnormal high pressure (63H operated)
U2
Abnormal high discharging temperature, high comp. surface temperature , shortage of refrigerant
U3
Open/short of outdoor unit thermistors (TH4, TH34)
U4
Open/short of outdoor unit thermistors (TH3, TH32, TH6, TH7 and TH8)
U5
Abnormal temperature of heatsink
U6
Abnormality of power module
U7
Abnormality of superheat due to low discharge temperature
U8
Abnormality in outdoor fan motor
Ud
Overheat protection
UF
Compressor overcurrent interruption (When Comp. locked)
UH
Current sensor error
UL
Abnormal low pressure (63L operated)
UP
Compressor overcurrent interruption
P1~P9 Abnormality of Interface or FTC units
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
Interface or FTC/outdoor communication error (Signal receiving error) (Outdoor unit)
E9
Interface or FTC/outdoor communication error (Transmitting error) (Outdoor unit)
EA
Miswiring of Interface or FTC/outdoor unit connecting wire
Eb
Miswiring of Interface or FTC/outdoor unit connecting wire (converse wiring or disconnection)
EC
Startup time over
E0~E6 Communication error except for outdoor unit
OCH534
