CF-12
DUAL, TRIPLE, POKER DC Inverter : 5. Control Functions
Multi Liberty
DC Inverter
5.5.4
Thermal protection on compressor [excluded Models HCKU 816 X4 & HCKU 1066 X4]
If temperature detected on compressor is too high (more than 120°C), and therefore protection device against
overcharge has intervened (with consequent opening of contact), the compressor is stopped. When protection device
is restored (closing of contact) - that is as soon as compressor temperature is lower than 105°C - the compressor
can restart. In this case too, however, at least 3-minute delay elapses since protection is restored.
5.5.5 Integrated protection functions on Inverter Module (IPM)
IPM Module (
“Intelligent Power Module”
) combines protections referred to current values, voltage values and
temperature values. In case of intervention of a function of this kind, the corresponding Protection Code will be
shown by LED display (or by display panel) on Indoor Unit and/or by 2-digit LED display on Outdoor Unit’s PCB.
5.5.6 Malfunction of temperature sensors (in case of bad connection or interruption of sensor)
Temperature sensors that are monitored by control electronics are the following: T1 (indoor temperature sensor),
T2 (heat exchanger temperature sensor of every Indoor Unit), T3 (outdoor temperature sensor) and T4 (heat
exchanger temperature sensor on Outdoor Unit).
5.5.7 Malfunction of indoor fan speed
If for at least 60 seconds, fan speed is higher than that foreseen for “High” speed setting, increased by 300rpm,
or lower than 400rpm, air conditioner stops because of a malfunction, and normal operation cannot be restored
automatically. Concerning HKEU X Multi Liberty Indoor Units, the malfunction will be indicated by the corresponding
Error Code, which is shown by LED display on Indoor Unit.
Model HCKU 606 X3
VOLLIMT1 = 245V, VOLLIMT2 = 220V, VOLLIMT3 = 80V
VOLREL1 = 265V, VOLREL2 = 240V, VOLREL3 = 100V
VOLFRE1 = 78Hz, VOLFRE2 = 45Hz
Model HCKU 806 X3
VOLLIMT1 = 245V, VOLLIMT2 = 220V, VOLLIMT3 = 120V
VOLREL1 = 265V, VOLREL2 = 240V, VOLREL3 = 135V
VOLFRE1 = 78Hz, VOLFRE2 = 45Hz
Model HCKU 706 X4
VOLLIMT1 = 245V, VOLLIMT2 = 220V, VOLLIMT3 = 120V
VOLREL1 = 265V, VOLREL2 = 240V, VOLREL3 = 135V
VOLFRE1 = 78Hz, VOLFRE2 = 45Hz
Model HCKU 816 X4
VOLLIMT1 = 221V, VOLLIMT2 = 210V, VOLLIMT3 = 80V
VOLREL1 = 260V, VOLREL2 = 225V, VOLREL3 = 100V
VOLFRE1 = 53Hz, VOLFRE2 = 44Hz
Model HCKU 1066 X4
VOLLIMT1 = 200V, VOLLIMT2 = 185V, VOLLIMT3 = 80V
VOLREL1 = 210V, VOLREL2 = 195V, VOLREL3 = 100V
VOLFRE1 = 54Hz, VOLFRE2 = 42Hz