Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 74

< O utdoor unit op eration monitor func tion>
[ W h en op tional p art " A - C ontrol S erv ic e T ool ( P A C - S K 5 2 S T ) " is c onnec ted to outdoor c ontroller b oard ( C N M ) ]
ON
1 2 3 4 5 6
< D igital indic ator L E D 1 working details>
1
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
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
Miswiring of indoor/ outdoor unit connecting wire, ex cessive number of indoor units (4 units or more)
EA
Miswiring of indoor/ outdoor unit connecting wire(converse wiring or disconnection)
Eb
Startup time over
EC
Communication error ex cept for outdoor unit
E0– E7
OCH526C
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 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, TH33, TH6, TH7 and TH8)
U5 Abnormal temperature of heatsink
U6 Abnormality of power module
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)
UH Current sensor error
UL Abnormal low pressure (63L operated)
UP Compressor overcurrent interruption
P1– P8 Abnormality of indoor units
PL Abnormality of refrigerant
A0– A7 Communication error of M-NET system
1 second
interval
ON
1 2 3 4 5 6
Warming-up
Compressor
Compressor
— —
— —
— —
— —
— ON
— ON
— ON
— ON
ON —
ON —
■
4-way valve
Solenoid valve
— —
— ON
ON —
ON ON
— —
— ON
ON —
ON ON
— —
ON —