OUT-51
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
LED Display on Indoor Units
1)
In case of operation malfunctions, the codified flashing of LED indicators on Indoor Units’
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.
Codified malfunctions: LED indicators of Multi Liberty (HTFU, HSFU, HRBU) X Indoor Units
OPERATION
TIMER
DEF./FAN
Outline of malfunction
Faulty temp. sensor (broken/in short-circuit) on O.U.
Communication error between Indoor Unit ↔ Outdoor Unit.
Protection for compressor’s overcurrent.
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).
Malfunction on drain condensation system (I.U. HTFU X only).
• Troubleshooting by LED Indicators of Multi Liberty (HTFU, HSFU, HRBU) X Indoor Units
Flashing
OFF
Flashing
Flashing
Flashing
Flashing
Flashing
OFF
Flashing
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
Flashing
OFF
OFF
Flashing
ON
OFF
Flashing
OFF
OFF
ALARM
OFF
Flashing
Flashing
OFF
ON
OFF
OFF
Operation mode in conflict with operation mode of other Indoor Units.
Too low/too high power supply voltage on O.U.
Flashing
OFF
Flashing
ON
ON
OFF
ON
OFF
ON
OFF
MANUAL
OPERATION TIMER DEF./FAN ALARM
MANUAL
ALARM
DEF./FAN
TIMER
OPERATION
• HTFU X, HRBU X Models
• HSFU X Models
Intervention of compressor’s thermal protection.
[Excluded Outdoor Units HCKU 816 X4, HCKU1066 X4]