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ESIE09-08A
Troubleshooting by Indication on the Remote Controller
Troubleshooting
195
3.44
“L8”
Indoor Unit: Inverter Current Abnormal
Remote Control
Display
L8
Subcode 10
Applicable Models
All indoor units
Method of
Malfunction
Detection
Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision Conditions
When overload in the compressor is detected.
Supposed Causes
Compressor overload
Compressor coil disconnected
Defect of indoor unit PC board [A4P (1
ø
) or A5P (3
ø
)]
Current protection (thermal)
Troubleshooting
Output current check
Caution
Inverter
output voltage
check Inverter output
voltage is not balanced
(Normal if within
5V). Must
be measured when
frequency is stable
Compressor overload
Inspection of the compressor and
refrigerant system is required
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor
NO
Replace the inverter PC board assy
[A4P (ø) or A5P (ø)]
YES
NO
Reset en Restart
NO
Replace the compressor
NO
YES
Compressor
inspection The
compressor's coil is
disconnected.
YES
YES
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
After
turning on again,
"
L8
- 10" blinks again.
The
secondary current
of the inverter is higher
than 13.1A, 260 sec for
each phase.
Summary of Contents for ALTHERMA HT ERSQ 011 AA
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...