16
→
3
2
1
→
Control modes
Control details
3-1. Drain pump control
• Always drain pump ON during the COOL and DRY mode operation.
(Regardless of the thermo ON/ OFF)
• When the operation mode has changed from the COOL or DRY to the
others (including Stop), OFF the control after the drain pump ON for 3
minutes.
Drain sensor function
• Energize drain sensor at a fixed voltage for a fixed duration. After energizing,
compare the drain sensor’s temperature to the one before energizing, and judge
whether the sensor is in the air or in the water.
Basic control system
• While drain pump is turned on, repeat the following control system and judge
whether the sensor is in the air or in the water.
• Drain sensor temperature rise (
∆
t)
• Temperature of drain sensor before current is applied (T
0
)
• Temperature of drain sensor after current is applied (T
1
)
[
∆
t =
T
1
–
T
0
]
(1) Initial setting : Start at COOL mode and horizontal vane.
(2) Vane position : Horizontal
→
Downward A
→
Downward B
→
Downward C
→
Swing
(3) Restriction of the downward vane setting
When setting the downward vane A, B or C in [Med] or [Low] of the fan
speed notch, the vane changes to horizontal position after 1 hour.
4. Vane
(up/down vane change)
3. Drain pump
Remarks
Drain sensor
Indoor control
P.C. board
CN31
"Only 1 Hr"
appears on the
wired remote
controller.
Timing of
energizing
drain sensor
ON
OFF
Stand by for
a minute
30
sec.
30
sec.
Detect the
temperature
before
energizing
(T0)
Detect the
temperature
after
energizing
(T1)
Judge whether
the sensor is in
the air or in the
water.
Stand by for
a minute
·······Repeat
From the preceding page
