Specifications

72
8-2. DRY operation
Control mode
Mode Function
RemarksControl
Compressor
Thermostat
The outdoor unit receives the setting temperature and the suction
temperature from the indoor unit by communication and judges by the
temperature difference between the setting temperature and the suction
temperature .
(The judgement method depends on the operation of the indoor unit .)
Indoor frost
prevention
Not available
w Other actuator control is same as the control in the cooling mode.
Control mode
mode Function
RemarksControl
Fixed control
Under one of the following conditions, the LEV opening is fixed during the
fixed time.
1 When the compressor stops.
The LEV opening is determined with the unit operating state before the
compressor stops and the capacity.
2 When the compressor starts.
The LEV opening is determined by the operating state, the ambient
temperature, and the capacity.
3 When detecting temperature-rise over.
When detecting over rise of the condensing temperature and the dis-
charging temperature because of an increase in the load etc. during
operation.
The LEV opening is different according to the operating state and the
capacity.
W Detecting the condensing temperature COOL : TH6
W Detecting the discharging temperature COOL/HEAT : TH4
4-way valve
Normal operating
Always OFF during normal operation
Bypass valve
(For PUH-
P5,6YGA)
Always OFF during cooling
Operation mode
change
When the mode changes HEAT ➔ COOL
4-way valve
HEAT COOL
ON
OFF
ON
OFF
Compressor
LEV control
The opening is fixed for three minutes from the startup.
Opening in the startup (Normal operation)
P1
P1.6
P2
P2.5
500
600
500
600
500
600
500
600
P3
P4
P5
P6
800
800
1000
1200
600
600
1000
1200
Model 1 min. from startup 1-3 min. 1 min. from startup 1-3 min.Model
OCT03-E-3.qxp 04.3.26 1:50 PM Page 72