Multi-Zone Technical Overview

REFERENCES
PAGE 117
ENGLISH
FLOW CHARTS
Caution: Be sure to turn power switch o before connecting or disconnecting the
connector, or parts may sustain damage.
NO
NO
YES
Use the remote control to turn on the unit.
Check whether the ambient temperature
is below 149°F
Did the unit malfunction after it had run for
some time?
Check the room temperature.
Check pipe temperature sensor.
Chek the temperature monitoring circuit of the
indoor main board.
Is the air ow of the indoor unit weak due to
blocked lters or poor condition of the fan?
Clean the lters.
Reinstall the fan.
Measure system pressure
YES
LED1 ashes 21 times
Activated when the temperature being sensed by the heat exchanger rises above 149°F
twice in 30 minutes