Mitsubishi Electric Mr.Slim PLH42AK, Technical & Service Manual

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OC193-3
FEATURES
2
1. ADVANCED MICROPROCESSOR CONTROL
(1) Easy to use Microprocessor (remote controller)
1) Ultra-Thin Remote Controller
The streamlined, square controller is designed to blend with any kind of interior and the adoption of a sophisticated
microprocessor allows you to carry out a wide range of operations easily.
2) Attractive Liquid Crystal Display (LCD)
Units operation mode, set temperature, room temperature, timer setting, fan speed, louver operation, and air flow direc-
tion are displayed on the remote controller with the easily understood visual Liquid Crystal Display (LCD).
3) Convenient 24-Hour ON-OFF Timer
The timer allows Mr.SLIM to be switched on and off automatically at the time you set. Once the timer is set, the remain-
ing time is shown on the LCD.
4) Self-Diagnostic Feature Indicates Faults Instantly
In the rare case when a problem occurs, the unit stops operating and the set temperature indicator changes to the self-
diagnostic indicator, indicating the location of the fault.
If the check switch is pressed twice, the unit stops operating and the check mode is initiated. The cause of the most
recent problem stored in the memory is displayed on the LCD. This is extremely useful for maintenance purposes.
5) Useful Memory Feature for Storing Instructions
The previous set value is memorized so that constant temperature control can be obtained. This is convenient when,
for example, a power failure occurs.
(2) Non-polar Two-Wire Remote Controller Cables
The non-polar, two-wire type remote controller cable is slim, installation is simple and trouble-free. Remote controller wire
can be extended up to 550 yards.
(3) Automatic Cooling/Heating Changeover Operation
An automatic cooling and heating changeover operation system is provided to ensure easy control and year-round air con-
ditioning.
Once the desired temperature is set, unit operation is switched automatically between cooling and heating, in accordance
with the room temperature. In addition, the use of outdoor unit fan speed controller enables cooling operation at outdoor
temperature as low as 23
-
F .
2. INNOVATIVE SYSTEM CONTROL BY MICROPROCESSORS
The most significant feature of the series PCH-EK is the advanced microprocessor system control. Behind the development
of this system is the recent world-wide trend in the air conditioning of larger buildings, away from centralized duct systems in
favor of a large number of individual split type units. There are a number of reasons for this: first, costly, troublesome duct
installation is eliminated; second, the overall air conditioning balance is excellent; and third, operation cost is low since flex-
ible control of each unit is possible. This system control was developed exclusively by Mitsubishi in the light of this demand.
Microprocessor control makes possible individual control, group control, control using two remote controllers, remote on/off
control and individual control without troublesome modifications to the equipment.
(1) Individual Control by Gathering Remote Controllers
A Series PCH-FK unit is installed in each room, and the remote controller are gathered together in separate location, where
each unit is controlled individually.
Each remote controller is connected to its indoor unit by non-polar 2-wire cable to eliminate the possibility of mis-wiring.
Separation can be as much as 550 yards, making this type of control extremely easy to implement. Thermistors in the
indoor unit maintain each room at its own individually set temperature.
Models Cooling capacity / Heating capacity SEER
PCH24EK
1
24,000 / 27,000 (33,500) Btu/h 10.3
PCH30EK
1
30,000 / 33,000 (41,500) Btu/h 10.0
PCH36EK
1
35,400 / 38,000 (47,600) Btu/h 10.4
PCH42EK
1
42,000 / 45,000 (54,600) Btu/h 10.0
PCH24EK
Indoor Unit Microprocessor
Remote controller
FILTER
CHECK MODE
TEST RUN
TIMER OFF TIMER
CHECK SET TEMP.
CLOCK AUTO AUTO
START STOP
SWING
FAN
SPEED
AUTO
RETURN