Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 837

(17) FILTER sign
When the operation time (time when the ON/OFF switch is turned to ON) is counted up at 600 hours
remote controller flickers.
This condition can be reset any time with the "Filter reset" switch. It is effective also to turn power OFF to reset.
Note (1) The function is invalidated if the jumper wire (J4) is opened. (See page 911 for the location of PCB.)
(18) Auto Swing Control (Excepted FDR, FDUM, FDFL, FDFU models)
(a) Have a louver motor to move the louvers up and down for the so called "AUTO SWING" function.
(b) The louver auto swing starts when the AUTO SWING switch is pressed once and stops when the AUTO SWING switch is
pressed again. The louver position is displayed on the LCD on the remote controller. During auto swing, the position displayed
on the LCD changes, but the positions of the louvers and the display are not coordinated. (The louvers swing3-4 times per
minute but the display changes once per second.)
(c) Stopping the louvers
When the AUTO SWING switch is pressed to stop the louver movement, the LCD louver-position display stops and the louvers
stop when they come to the position displayed on the LCD. There are four louver stop position on the LCD. (When jumper wire
J2 on the indoor unit printed circuit borad is cut, the louvers stop immediately at the AUTO SWING switch is pressed to stop
them and the LCD display changes to show this posiition. Refer to page 911 for position of jumper wire J2.
(d) Movement of louver when the power supply to the controller controlling 4 positions of the louver is switched on.
When power supply is switched on, the louver will automatically swing about 2 times (without operating remote controller).
This is an action for the microcomputer to confirm the louver position in order to input the cycle of the luver motor (LM) to the
microcomputer with the limit switch (LS) pushing the louver motor (LM). If the LS action is not input to the microcomputer, the
louver will stop within 1 minute after the power supply is switched on and will not move from then on.
(e) Keeping the louvers horizontal during heating
While HOT KEEP is displayed (during hot start operation or when the thermostat has turned off during heating operation), the
louvers stay in the horizontal position to prevent cold drafts, independent of the setting of the AUTO SWING switch (auto swing
or stop). The louver position display of LCD displays continuously the original position before this control operation. When the
HOT KEEP display goes out, both the louver and the LCD display return to their previous positions. (However, after the power
supply to the unit is switched on, the louvers swing two times as a check of the power source frequency, regardless of the setting
of the ON/OFF or AUTO SWING switches.)
(19) Condensate pump motor (DM) control (Only FDT, FDTW, FDTS, FDR, FDUM models)
(a) Drain motor is started no sooner than the compressor is turned ON during cooling or dehumidifying operation. The drain motor
continues to operate for 2 minutes after the stop of unit operation, stop with the error stop, thermostat stop and at switching from
cooling or dehumidifying operation to blowing or heating operation. When there is any unit subjected to oil return control, the
drain motor is operated for 3 minutes at such occasion.
Note (1) Drain motor may be operated forcibly by turning ON the dip switch SW
(b) Overflow detection is always operable by means of the float switch regardless of operation modes. If the overflow is detected (or
when the float switch is disconnected or its wire is broken), operation is stopped with the error stopped. (FDT, FDTW, FDTS,
FDR and FDUM) If the overflow is detected while the drain motor is stopped, the drain motor is operated for 3 minutes and then
the overflow detection is performed to judge whether it is normal or not.
on the PCB. Turn the switch OFF to stop the drain motor.
5-3
FDC-HKX
(1)
, the filter sign on the
835