Mitsubishi Electric Mr. Slim PUHZ-SHW230YKA Service Manual page 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".
Operation indicator SW2 : Indicator change of self diagnosis
SW2 setting
ON
1 2 3 4 5 6
<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.
LED1
The tens digit : Operation mode
Display Operation Model
O OFF / FAN
C COOLING / DRY
H HEATING
d DEFROSTING
w C5 is displayed during replacement operation.
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 Inspection unit
0 Outdoor unit
1 Interface or FTC
Display
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
Display detail
(Lighting)
The ones digit : Relay output
Display
0
1
2
3
4
5
6
7
8
A
Display
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
Contents to be inspected (When power is turned on)
39
Explanation for display
1 second
interval
ON
Warming-up
Compressor
Compressor
— —
— —
— —
— —
— ON
— ON
— ON
— ON
ON —
ON —
Contents to be inspected (During operation)
SW2
(Initial setting)
1 2 3 4 5 6
4-way valve
Solenoid valve
— —
— ON
ON —
ON ON
— —
— ON
ON —
ON ON
— —
ON —
Unit