Mitsubishi City Multi Series PLFY-P08NCMU-E Technical & Service Manual page 17

From the preceding page
Control modes
3. Drain pump
3-1. Drain pump control
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.
Timing of
energizing
drain sensor
• Drain sensor temperature rise (∆t)
• Temperature of drain sensor before current is applied (T
• Temperature of drain sensor after current is applied (T
[ ∆t = T
4. Vane
(1) Initial setting : Start at COOL mode and horizontal vane.
(2) Vane position : Horizontal →Downward A →Downward B →Downward C→Swing
(up/down vane change)
(3) Restriction of the downward vane setting
OCH410D
• 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.
ON
OFF
Stand by for
a minute
Detect the
temperature
before
energizing
(T0)
– T ]
1 0
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.
Control details
30 Stand by for 30
sec. a minute sec.
Detect the
temperature
after
energizing
(T1)
)
0
)
1
17
Remarks
Drain sensor
Indoor control
P.C. board
CN31
·······Repeat
Judge whether
the sensor is in
the air or in the
water.
"Only 1 Hr"
appears on the
wired remote
controller.
1
2
3