7.
OUTLINE OF CONTROL CIRCUIT
98
NO.
ITEM
OUTLINE OF SPECIFICATION
REMARKS
12
Low ambient cooling
12-1
Control of the
Outdoor Unit fan is made
to meet with cooling
demand at low outdoor
temperatures. It is based
on the outdoor heat
exchanger temperature,
TL.
12-2
Control by outdoor
heat exchanger
temperature TL is
illustrated on the right.
12-3
For first 30 seconds
after starting cooling
operation, the fan(s)
operate on “High” speed.
<Outdoor Unit
control>
13
Check display
Fault diagnosis is carried out by pressing the [CHECK]
key on the remote controller. The check code is shown on
the LCD display.
14
Anti-restart timer
The Outdoor Unit delays restarting for 2 mins 30s to
prevent short cycling of the compressor.
Refer to fault code section (6.4) of this manual for more details.
15
Group operation
control
Up to 16 units can be controlled in same setting condition
by one remote controller.
However, thermo-control function is independent.
Respective delayed start time for preventing simultaneous
large starting currents is obtained by the setting of the unit
No. switch on the indoor PCB. Refer to section 11.
Outdoor Fan Control
54
40
35
20
C
B
A
D
E
(
°
C)
Outdoor Coil (TL)
Air Quantity
A Zone
B Zone
C Zone
D Zone
E Zone
Maximum
Per 20 s 1 wave
Maintain
Per 20 seconds – 1 wave
Minimum
Check code
Unit number
2nd fault
1st fault
Indoor Unit
number
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