Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 40

Control modes
3-1. Drain pump control
3. Drain pump
•Always drain pump ON during the COOL and DRY mode operation.
(Regardless of the compressor 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.
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
(1) Initial setting : Start at COOL mode and horizontal vane.
4. Vane
(2) Vane position : Horizontal
(up/ down vane change)
(3) Restriction of the downward vane setting
When setting the downward vane A, B and C in [Medium2] or [Low] of the fan
speed notch, the vane changes to horizontal position after 1 hour have passed.
Control details
ON
OFF
Stand by for 30 sec.
a minute
Detect the
temperature
before
energizing
(T0)
– T ]
1 0
Downward A
Stand by for 30 sec.
a minute
Detect the Judge whether
temperature the sensor is in
after the air or in the
energizing water.
(T1)
)
0
)
1
Downward B Downward C Swing
40
Remarks
1 Drain sensor
Indoor controller
board
CN31 1
2
3
2 If the unit is
without the
drain sensor,
install the
jumper
·······Repeat
connector.
Indoor controller
board
1
CN31
2
3
When installing
the jumper
connector,
determine to
detect
compulsorily in
the air.
1 Whether the
unit has a swing
function is listed
in the function/
control specifications.
2 See the
function/control
specifications
for the vane
motor type.
3 "1Hr"
appears on the
wired remote
controller.