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ESIE09-08A
Troubleshooting by Indication on the Remote Controller
Troubleshooting
143
3.2
“A6”
Indoor Unit: Pump Error (M1P) or Other Water System
Error
Remote Control
Display
A6
Subcode 0
Applicable Models
All indoor unit models
Method of
Malfunction
Detection
Detection by failure of signal for detecting number of turns to come from the pump motor. Detection by
failure ref. sensors.
Malfunction
Decision Conditions
When number of turns cannot be detected even when output voltage to the pump motor is maximum.
When water sensors are not within expected range.
Supposed Causes
Pump rotor locked
Disconnected or faulty wiring between pump connector and PC board (A1P)
Blocked waterflow or heat exchanger (waterside)
Troubleshooting
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Connect the wiring and turn on again.
Fix the wiring and turn on again.
YES
NO
NO
NO
NO
NO
YES
YES
Replace the indoor unit PC board.
Replace the pump motor.
(V2779)
Is the
wiring from the
pump securely connected
to connectors (X20A) on the
indoor unit PC board?
(A1P)
Wiring
between the indoor
unit PC board and pump is
disconnected.
Does the pump run?
YES
Can be checked - Too high T° difference
|Return water
- R-134a liquid T°|>40°C
|Leaving water T° - condense temp|>15°C
- Too small T° difference
|Leaving water
- return water temp|<1°C
Is the
waterflow or heat
exchanger
blocked?
YES
Make sure all valves are open.
Make sure filter is not clogged.
Make that sure water pressure is OK
(0,3bar<P<3bar).
Make sure that all valves are open.
Make sure that all air is out of the system.
Is the pump
rotor locked?
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 ...