<Outdoor unit operation monitor function>
[When optional part “A-Control Service Tool (PAC-SK52ST)” is connected to outdoor controller board (CNM)]
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ON
2 3 4 5 6
<Digital indicator LED1 working details>
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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
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Display Contents to be inspected (When power is turned on)
F3
F5
F9
E8
E9
EA
Eb
EC
EE
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
Incorrect connection
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
U7
U8
Ud
UF
UH
UL
UP
P1–P8
Abnormal high pressure (63H operated)
Abnormal high discharge temperature, high comp. surface temperature,
shortage of refrigerant
Open/short of outdoor unit thermistors (TH4, TH33)
Open/short of outdoor unit thermistors (TH3, TH32, TH6, TH7 and TH8)
Abnormal temperature of heat sink
Abnormality of power module
Abnormality of superheat due to low discharge temperature
Abnormality in outdoor fan motor
Overheat protection
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure (63L operated)
Compressor overcurrent interruption
Abnormality of indoor units
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