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<Outdoor unit operation monitor function>
[When optional part 'A-Control Service Tool (PAC-SK52ST)' is connected to outdoor controller board or switch board (CNM)]
ON
1
2 3 4 5 6
<Digital indicator LED1 working details>
1
LED1
The tens digit : Operation mode
Display
Operation Model
O
OFF/FAN
C
COOLING/DRY*
H
HEATING
d
DEFROSTING
2
Display Inspection unit
0
Outdoor unit
1
Indoor unit 1
2
Indoor unit 2
3
Indoor unit 3
4
Indoor unit 4
Display Contents to be inspected (When power is turned on)
63L connector (red) is open.
F3
63H connector (yellow) is open.
F5
2 connectors (63H) are open.
F9
Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
E8
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
The ones digit : Relay output
Display
0
1
2
3
4
5
6
7
8
A
Display
Contents to be inspected (During operation)
Abnormal high pressure (63H operated)
U1
Abnormal high discharging temperature and shell thermistor, shortage of refrigerant
U2
Open/short circuit of discharging thermistor (TH4) and comp.surface thermistor (TH34)
U3
U4
Open/short of outdoor unit thermistors (TH3, TH6, TH7 and TH8)
U5
Abnormal temperature of heat sink
Abnormality of power module
U6
Abnormality of superheat due to low discharge temperature
U7
Abnormality in outdoor fan motor
U8
Ud
Overheat protection
UF
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
UH
Abnormal low pressure
UL
Compressor overcurrent interruption
UP
P1–P8
Abnormality of indoor units
A0–A7
Communication error of M-NET system
1 second
Warming-up
Compressor
4-way valve Solenoid valve
Compressor
—
—
—
—
—
—
—
—
ON
—
—
ON
—
ON
—
—
ON
—
—
ON
ON
—
ON
ON
ON
—
—
ON
—
ON
50
interval
ON
1
2 3 4 5 6
—
ON
—
ON
—
ON
—
ON
—
—
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