65
OCH775
<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 check code by
controlling DIP SW2 on ‘A-Control Service Tool’.
Operation indicator SW2: Indicator change of self-diagnosis
SW2 setting
1
ON
2 3 4 5 6
Display detail
Explanation for display
Unit
<Digital indicator LED1 working details>
(Be sure that 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.
(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 Mode
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.
(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)
F5
E8
E9
EA
Eb
EC
E0–E7
63H connector(yellow) is open/TRS connector is 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(reversed wiring or disconnection)
Startup time over
Communication error except for outdoor unit
Display Inspection unit
0
1
2
3
4
Outdoor unit
Indoor unit 1
Indoor unit 2
Indoor unit 3
Indoor unit 4
Display
Contents to be inspected (During operation)
U1
U2
U3
U4
U5
U6
U7
U8
Ud
UF
UH
UL
UP
PL
P1–Pb
A0–A7
Abnormal high pressure(63H operated)/High compressor temperature (TRS operated)
Abnormal high discharge temperature and comp. surface thermistor, shortage of refrigerant
Open/short circuit of discharge thermistor(TH4) and comp. surface thermistor (TH33)
Open/short of outdoor unit thermistors (TH3, 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
Compressor overcurrent interruption
Abnormality of refrigerant
Abnormality of indoor units
Communication error of M-NET system
