Troubleshooting by Indication on the Remote Controller
196
Troubleshooting
3.45
“
U5
”
Malfunction of Transmission between Remote
Controller and Indoor Unit
Remote
Controller
Display
U5
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote controller, check the system using microcomputer is signal
transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Malfunction of indoor unit remote controller transmission
Connection of two main remote controllers (when using 2 remote controllers)
Defect of indoor unit PC board
Defect of remote controller PC board
Malfunction of transmission caused by noise
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2823)
NO
YES
YES
NO
Replace indoor unit PC
board.
Set one remote controller to
"SUB"; turn the power supply
off once and then back on.
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
NO
NO
Using
2-remote controllers
control.
All indoor
PC board microcomputer
monitors blink.
YES
Multi-core
cableis used for the
indoor unit remote controller
transmission
wiring.
Operation
returns to normal when
the power is turned off
momentarily.
YES
YES
SS1 of
both remote controllers
is set to "MAIN."
NO
Switch to double-core
independent cable.
replacement
Defect of remote controller PC
board or indoor unit PC board.
Replace whichever is
defective.
Urban Multi ML5 · Mini UM · Heat Pump
Summary of Contents for U-4..6ML5XPQ
Page 1: ...Service Manual U 4 6ML5XPQ DPQ Urban Multi Mini UM Heat Pump ...
Page 2: ......
Page 12: ...Introduction x Urban Multi ML5 Mini UM Heat Pump ...
Page 37: ...Specifications Specifications 25 Panasonic ...
Page 38: ...Specifications 26 Specifications Urban Multi ML5 Mini UM Heat Pump ...
Page 39: ...Specifications Specifications 27 Panasonic ...
Page 40: ...Specifications 28 Specifications Urban Multi ML5 Mini UM Heat Pump ...
Page 134: ...Field Setting 122 Test Operation Urban Multi ML5 Mini UM Heat Pump ...
Page 235: ...Piping Diagrams Appendix 223 U 4 5 6ML5DPQ 3D052712 Panasonic ...
Page 238: ...Piping Diagrams 226 Appendix Urban Multi ML5 Mini UM Heat Pump ...
Page 240: ...Wiring Diagrams 228 Appendix U 4 5 6ML5DPQ 3D05811B Urban Multi ML5 Mini UM Heat Pump ...
Page 241: ...Wiring Diagrams Appendix 229 2 2 Field Wiring U 4 5 6ML5XPQ 3D057919 Panasonic ...
Page 242: ...Wiring Diagrams 230 Appendix U 4 5 6ML5DPQ 3D052597 Urban Multi ML5 Mini UM Heat Pump ...
Page 243: ...Wiring Diagrams Appendix 231 2 3 Indoor Unit S 20 25 32 63LM3HPQ Panasonic ...
Page 244: ...Wiring Diagrams 232 Appendix S 40 50 80 125LM3HPQ Urban Multi ML5 Mini UM Heat Pump ...
Page 245: ...Wiring Diagrams Appendix 233 S 20 25 32 40 50 63 80 100 125UM4JPQ Panasonic ...
Page 246: ...Wiring Diagrams 234 Appendix S 20 25 32 40 50YM3HPQ Urban Multi ML5 Mini UM Heat Pump ...
Page 247: ...Wiring Diagrams Appendix 235 S 25 32 40 63DM3HPS 3D039564C Panasonic ...
Page 248: ...Wiring Diagrams 236 Appendix S 20 25NM3HPQ Urban Multi ML5 Mini UM Heat Pump ...
Page 249: ...Wiring Diagrams Appendix 237 S 20 25 32 40 50 63FM3HPQ Panasonic ...
Page 250: ...Wiring Diagrams 238 Appendix S80 100 125FM3HPQ Urban Multi ML5 Mini UM Heat Pump ...
Page 252: ...Wiring Diagrams 240 Appendix S 32 63 100TM3JPR 3D039801D Urban Multi ML5 Mini UM Heat Pump ...
Page 255: ...Wiring Diagrams Appendix 243 Panasonic ...
Page 256: ...Wiring Diagrams 244 Appendix Urban Multi ML5 Mini UM Heat Pump ...
Page 257: ...Wiring Diagrams Appendix 245 Panasonic ...
Page 259: ...Option List Appendix 247 Panasonic ...
Page 262: ...Example of Connection 250 Appendix Urban Multi ML5 Mini UM Heat Pump ...
Page 283: ......