General Information; Specific Features; How To Read The Model Name - Mitsubishi Heavy Industries SRK20ZD-S1 Technical Manual

1.1.1 GENERAL INFORMATION

(1) Specific features

The "MITSUBISHI HEAVY INDUSTRIES, LTD" room air-conditioner: SRK series are of split and wall mounted type and the unit
consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or
heating equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor.
(a) Inverter (Frequency converter) for multi-steps power control
¡ Heating/Cooling
The rotational speed of a compressor is changed in step in relation to varying load, interlocked with the indoor and outdoor unit
fans controlled to change frequency, thus controlling the capacity.
¡ Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the
unit has stabilized.
(b) Fuzzy control
¡ Fuzzy control calculates the amount of variation in the difference between the return air temperature and the setting temperature
in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.
(c) Remote control flap
The flap can be automatically controlled by operating wireless remote control.
¡ Air scroll (AUTO): Flap operation is automatically control.
¡ Swing: This will swing the flap up and down.
¡ Memory flap: Once the flap position is set, the unit memorizes the position and continues to operate at the same position from
the next time.
(d) Self diagnosis function
¡ We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as
follows.
RUN light
1 time flash
TIMER light
2 time flash
ON
6 time flash

(2) How to read the model name

Example :
Heat exchanger sensor error
Room temperature sensor error
Indoor fan motor error
SR K 35 Z D - S1
TIMER light
1 time flash
RUN light
2 time flash
keeps flashing
4 time flash
1 time flash
2 time flash
RUN light
3 time flash
ON
5 time flash
6 time flash
7 time flash
RUN light
2 time flash
2 time flash
R410A models
Series No.
Inverter type
Product capacity
Wall mounted type
Split type room air-conditioner
3
- -
Outdoor temperature sensor error
Outdoor heat exchanger liquid
pipe sensor error
Discharge pipe sensor error
Current cut
Trouble of outdoor unit
Over current
Over heat of compressor
Error of signal transmission
Outdoor fan motor error
Rotor lock