–28–
Display
Check unit
0
Outdoor unit
1
Indoor unit 1
2
Indoor unit 2
3
Indoor unit 3
4
Indoor unit 4
Display
Compressor
4-way valve
Bypass solenoid valve
0
–
–
–
1
–
–
ON
2
–
ON
–
3
–
ON
ON
4
ON
–
–
5
ON
–
ON
6
ON
ON
–
7
ON
ON
ON
<Outdoor unit operation monitoring function>
The operation status and check code contents can be ascertained by means of the 2-digit number and symbol on digital
display light emitting diode LED2 by operating DIP switch SW2.
<Description of operation of digital display light emitting diode (LED2)>
•
When ON (normal operation): Displays the operation mode.
OFF
ON
1 2 3 4 5 6
(Load status)
•
When blinking (Operation stopped by tripping protection device): Displays the check mode
[Tens digit: Operation mode]
Display
Operation mode
O
stopped
C
Cooling/Dry
H
Heating
d
Defrost
[Units digit: Relay output]
•
PUH-P8YE/P10YE
Display
Check contents (at power on)
E8
Indoor-outdoor communication receive abnormal (outdoor unit)
E9
Indoor-outdoor communication send abnormal (outdoor unit)
EA
Indoor/outdoor connection erroneous wiring, number of indoor
units mismatch
Eb
Indoor/outdoor connection erroneous wiring (indoor unit power
failure, disconnection)
Ed
Serial communication abnormal (M-NET)
E0-E7
Communication other than outdoor unit abnormal
F8
Input circuit faulty
Display
Check contents (operating)
U2
Compressor discharge temperature abnormal, CN23 short-circuit connector unplugged
U3
Compressor discharge temp thermistor (TH2) open/short
U4
Liquid temp thermistor (TH1), Condenser/evaporater temp thermistor (TH3) open/short
U6
Compressor overcurrent protection trip (51C trip)
UE
High pressure protection (63H1 trip)
UL
Low pressure protection (63L trip)
P1-P8
Indoor unit abnormal
A0-A8
M-NET communication abnormal
ON
SW2
LED2
