Unical CMCS 12HI, User Manual

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4. LED INDICATORS ON INDOOR UNIT
The electronics of the air conditioner is able to diagnose eventual malfunctions which can be interpreted
by the 4 LED indicators on the Indoor Unit's frontal panel. According to the state of each indicator (ON,
flashing, OFF), the Authorized Technical Service is able to detect the common type of anomalies.
OPERATION LED
When connecting the Unit to the power source, the LED starts flashing. During the air conditioner's
operation, it stops flashing and lights up.
TIMER LED
It lights up when TIMER function is selected (air conditioner's programmed start and/or stop).
PRE/DEF (DEFROST/PREHEATING) LED
• In Heating mode, if a layer of frost forms on the outdoor heat exchanger, defrosting automatically
starts and the LED lights up.
• The LED also lights up when indoor heat exchanger's Preheating function is activated. This
occurs in Heating mode, in order to avoid the emission of air at low temperature (prevention
function anti-cold drafts).
ALARM LED
The LED flashes when the level in the water condensate pan exceeds the operation limit.
This also makes the compressor stop, till the condensate drain pump has eliminated the surplus
water.
TEMPORARY button
To start the air conditioner when the remote controller is not available, and to start the Test mode
in Cooling operation.
Buzzer
It emits a sound when a signal is received by the Indoor Unit.
Signal receiver
It permits to receive signals from the remote controller.
1
2
3
4
5
6
7
2 3 4 1
5 6
7
TEMPORARY
OPERATION TIMER DEF./FAN ALARM
OPERATION LED
1
2
TIMER LED
3
PRE/DEF LED
4
ALARM LED