OUT-63
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
Codified malfunctions: LED indicators of Multi Liberty (HFIU 266 X, 356 X) Indoor Units
OPERATION
TIMER
PRE-DEF.
Outline of malfunction
Faulty temp. sensor (broken/in short-circuit) on O.U.
Communication error between Indoor Unit ↔ Outdoor Unit.
Operation mode in conflict with operation mode of other Indoor Units.
Malfunction of indoor temp. sensor (broken/in short-circuit) T1 (I.U.)
Malfunction of heat exchanger’s temp. sensor (broken/in short-circuit) T2 (I.U.)
Faulty EEPROM on Indoor Unit.
Intervention of a protection on Inverter Module (IPM).
• Troubleshooting by LED indicators on Multi Liberty (HFIU 266 X, 356 X) Indoor Units
“TIMER” LED
“PRE-DEF.” LED
“OPERATION” LED
Flashing
Flashing
Flashing
Flashing
Flashing
Flashing
ON
OFF
OFF
Flashing
OFF
OFF
OFF
Flashing
OFF
Flashing
Flashing
OFF
Flashing
OFF
ON
Flashing
OFF
OFF
LED Display on Indoor Units
1)
In case of operation malfunctions, the codified flashing of LED indicators on display
allows to explain the cause of malfunction, thus making easier the troubleshooting.
2) As far as the list of malfunctions and the detailed outline of each malfunction are
concerned, see the following Table and the following pages.
Intervention of compressor’s thermal protection.
[Excluded Outdoor Units HCKU 816 X4, HCKU1066 X4]