ESIE09-08A
Troubleshooting by Indication on the Remote Controller
Troubleshooting
213
3.58
“U5”
Malfunction of Transmission between Remote Control
and Indoor Unit
Remote Control
Display
U5
U5
Subcode 0
Applicable Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote control, check the system using microcomputer is signal
transmission between indoor unit and remote (correct if faulty) control (main and sub) is normal.
Malfunction
Decision Conditions
Normal transmission does not continue for specified period.
Supposed Causes
Malfunction of indoor unit remote control transmission
Connection of two main remote controls (when using 2 remote controls)
Defect of indoor unit PC board (A1P)
Defect of remote control PC board
Malfunction of transmission caused by noise
Troubleshooting
: Refer to information on P221.
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
(V2823)
NO
YES
YES
NO
Replace indoor unit PC
board (A1P).
Set one remote control 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
controls control.
All
indoor PC board
microcomputer monitors
blink.
YES
Multi-core
cables used for the
indoor unit remote control
transmission wiring.
Operation
returns to normal
when the power is turned
off momentarily.
YES
YES
SS1 of both
remote controls is set to
"MAIN."
NO
Switch to double-core
independent cable.
replacement
Defect of remote control PC
board or indoor unit PC board (A1P).
Replace which ever is
defective.
Check No.3
Summary of Contents for ALTHERMA HT EKBUHAA6 V3
Page 2: ......
Page 7: ...ESIE09 08A Table of Contents v 1 3 Service Tools 283 Index i Drawings Flow Charts iii ...
Page 16: ...Model Names of Indoor Outdoor Units Tanks ESIE09 08A 4 General Information ...
Page 28: ...Refrigerant Circuit ESIE09 08A 16 Refrigerant Circuit EKHBRD 011 014 016 AB AC V1 Y1 ...
Page 40: ...Functional Parts Layout ESIE09 08A 28 Refrigerant Circuit ...
Page 63: ...ESIE09 08A PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 Refrigerant Circuit 51 ...
Page 64: ...PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 ESIE09 08A 52 Refrigerant Circuit ...
Page 125: ...ESIE09 08A Field Setting Test Operation 113 ...
Page 232: ...Troubleshooting by Indication on the Remote Controller ESIE09 08A 222 Troubleshooting ...
Page 237: ...ESIE09 08A Piping Diagrams Appendix 227 EKHBRD 011 014 016 AB AC V1 Y1 ...
Page 250: ...Wiring Diagrams ESIE09 08A 240 Appendix EKHBRD 011 014 016 AB AC V1 ...
Page 251: ...ESIE09 08A Wiring Diagrams Appendix 241 ...
Page 256: ...Wiring Diagrams ESIE09 08A 246 Appendix EKHBRD 011 014 016 AB AC Y1 ...
Page 257: ...ESIE09 08A Wiring Diagrams Appendix 247 ...
Page 260: ...Wiring Diagrams ESIE09 08A 250 Appendix ...