Zibro S 3025, Service Manual, Page: 25 / 40

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9. Electronic function
9.1 Abbreviation
T1: Indoor ambient temperature
T2: Pipe temperature of indoor heat exchanger
T3: Pipe temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
9.2 Display function
9.2.1 Icon explanation on indoor display board.
Auto indicator
This indicator illuminates when the air conditioner is in AUTO operation.
PRE.-DEF. Indicator
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air
control feature is activated in heating mode.
OPERATION indicator
This indicator illuminates when the air conditioner is running.
Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
9.2.2 LED display control function.
Pressing “LED display” button on remote controller will turn off all displays on indoor unit, while pressing once again,
all displays will resume.
9.3 Protection
9.3.1 Protection of compressor top temperature.
When the Over-load Protector is cut due to too high temperature of compressor top, the unit will stop. When the
Over-load Protector is closed again due to decreasing of compressor top temperature, the unit will restart( in this
case the compressor is restricted by Three Minutes Delay protection).
9.3.2 Protection of discharge temperature (Td).
1) Compressor will stop immediately if Td>115 for 5s.
2) If 90 ≤ Td ≤ 115 , compressor will run with restricted frequency.
3) If Td<90 , compressor will restart or run without restricted frequency
9.3.3 Three Minutes Delay at restart for compressor.