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Troubleshooting by Indication on the Remote Controller
ESIE09-08A
218
Troubleshooting
3.63
“UH”
Malfunction of System, Refrigerant System Address
Undefined
Remote Control
Display
UH
UH
subcode 0
Applicable Models
AII indoor unit models
All outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision Conditions
Supposed Causes
Improper connection of transmission wiring between outdoor unit and outdoor unit outside control
adapter
Defect of indoor unit PC board (A1P)
Defect of outdoor unit PC board (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
(V2831)
NO
YES
Fix incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
Normal
NO
Is
electricity
being introduce for
the first time after
installation or after an indoor
or outdoor unit PC
board has been
replaced?
Is
indoor -
outdoor
transmission wiring
normal?
YES
NO
Does a
"
UH
" malfunction
occur without
subcode “0”?
YES
NO
Does a
malfunction occur
even after 12 minutes
elapses from the time when
electricity is introduced
to indoor and
outdoor
unit?
YES
Replace indoor unit PC board (A1P).
Replace outdoor unit PC
board (A1P).
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 ...