Mitsubishi Electric Mr.SLIM PUHZ-RP1.6VHA Technical & Service Manual page 68

<Outdoor unit operation monitor function>
[When option 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 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)
1Operation mode display.
LED1
The tens digit : Operation mode
Display Operation Model
O OFF / FAN
COOLING / DRY w
C
H HEATING
d DEFROSTING
wC5 is displayed during replacement
operation. <for RP4-RP6>
2Display 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 Indoor unit 1
2 Indoor unit 2
3 Indoor unit 3
Display Contents to be inspected (When power is turned on)
F3 63L connector(red) is open.
63H connector(yellow) is open.
F5
2 connectors (63H/63L) are open.
F9
Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
E8
Indoor/outdoor communication error (Transmitting error) (Outdoor unit)
E9
Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)
EA
Mis-wiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)
Eb
Startup time over
Ec
Communication error except for outdoor unit
E0~E7
Display detail
(Lighting)
The ones digit : Relay output
Display
0
1
2
3
4
5
6
7
8
A
Display Contents to be inspected (During operation)
U1 Abnormal high pressure (63H worked)
U2 Abnormal high discharging temperature, shortage of refrigerant
U3 Open/short circuit of discharging thermistor(TH4)
U4 Open/short of outdoor unit thermistors(TH3, TH6, TH7 and TH8)
U5 Abnormal temperature of heat sink
U6 Abnormality of power module
U7 Abnormality of super heat due to low discharge temperature
U8 Abnormality in outdoor fan motor. (RP4-RP6YHA)
UF Compressor overcurrent interruption (When Comp. locked)
UH Current sensor error
UL Abnormal low pressure (63L worked)
UP Compressor overcurrent interruption
P1~P8 Abnormality of indoor units
A0~A7 Communication error of high-prior signal (M-NET)
Explanation for display
1 second
interval
ON
1 2 3 4 5 6
Warming-up
Compressor
Compressor
— —
— —
— —
— —
— ON
— ON
— ON
— ON
ON —
ON —
68
Unit
SW2
(Initial setting)
4-way valve
Solenoid valve
— —
— ON
ON —
ON ON
— —
— ON
ON —
ON ON
— —
ON —