Manual Unit Control And Led Indicators; Recovery From Power Failure - Technibel MCA451R Technical Data & Service Manual

Split system air conditioner
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7-13 Manual Unit Control and LED indicators

The push button switch and the LED indicators on the display panel let the user to control the unit
operation without a remote controller. Their operations are provided below.
LED indicators:
STAND BY
INDICATOR
OPERATION
INDICATOR
TIMER INDICATOR
Push Button switches:
MODE BUTTON
(Cool, Heat, SB)

7-14 Recovery from Power Failure

Last unit settings (SPT, operation mode, louver settings, etc) are saved in the EEPROM in the unit. In case
of power failure, these settings are restored automatically.
1. Lights up when the Air Conditioner is connected to power and
ready to receive the R/C commands
2. Blinks continuously in case of any thermistor failure.
1. Lights up in operation mode (Note: OFF in standby mode).
2. Blinks for 0.5 sec., to announce that a R/C infrared signal has
been received and stored.
3. Blinks continuously during
? OCT High Pressure Protection Mode
? Deicing in Heating Mode
1. Lights up during Timer and Sleep operation.
2. Active On/Off timer setting will become invalid after a power
failure. When this happens, the unit is forced to restart in STBY
mode, and the Timer Indicator is blinked continuously until (i)
the unit is switched to OPER Mode again, or (ii) any message
from the R/C is received.
Use to cycle the operation mode of the A/C unit among COOL,
HEAT and SB modes, without using the R/C.
Every time this switch is pressed, the next operation mode is
selected, in the order :
SB => Cool Mode => Heat Mode => SB => ...
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Gr451rGr601rMca601r

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