Mitsubishi Heavy Industries SRK25QA-S User Manual

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1 GENERAL INFORMATION
1.1 Features
(1) Inverter
● Heating/cooling
The rotate speed of the compressor is changed steplessly in relation to varying load, and is
linked with the fans of indoor and outdoor units controlled by the changes of frequency, thus
controls the power.
● Allowing quick heating/cooling operation during start-up period.
The room temperature is kept constant through fine-tuned control after the machine is
stabilized.
(2) Fuzzy control: According to the fuzzy control technology, the room temperature and humidity,
etc. are obtained through dynamic analysis to accurately regulate the rotate
speeds of the compressor and the fan to realize precise temperature control.
(3) Life: Actual service life: over 20,000 hours; Working life: over 100,000 hours; On/off of relay:
over 100,000 times; Continuous on of LED: over 50,000 hours; On/off of emergency
switch: over 10,000 times.
(4) Self diagnosis function: We will continuously provide the best services for our customers
through devices judging abnormal operation, as follows:
The air conditioner indicates the error of the indoor and outdoor sensors (thermistors) only when
it is in the stop mode. Error indication is removed after restart.
1.2 Model identification
R410A Refrigerant used
Master pattern change code
Master pattern
Capacity
Wall mounted type (C is the code for outdoor unit.)
Split type room air conditioner
TIMER lamp
ON
RUN lamp
keeps flashing
RUN lamp
ON
RUN lamp
Flash 2 times
RUN lamp
Flash 1 time
Flash 2 times
Flash 5 times
Flash 6 times
TIMER lamp
Flash 1 time
Flash 2 times
Flash 4 times
Flash 1 time
Flash 2 times
Flash 3 times
Flash 4 times
Flash 5 times
Flash 6 times
Flash 2 times
Failure Causes
Heat exchanger sensor error
Room temperature sensor error
Abnormal voltage input
Indoor fan motor error
Outdoor unit temperature sensor
error
Outdoor unit heat exchanger liquid
pipe sensor error
Vent-pipe sensor error
Current cut
Outdoor unit error
Safe current
Power transistor error
Compressor over heat protection
Signal transmission error
Rotor lock
Heat exchanger sensor wire break, poor connector connection
Room temperature sensor wire break, poor connector connection
Voltage too high or too low
Failure of fan motor, poor connector connection
Outdoor unit sensor wire break, poor connector connection
Heat exchanger liquid pipe sensor wire break, poor connector
connection
Vent-pipe sensor wire break, poor connector connection
Compressor blockage, compressor output open-phase, power short
circuit, control valve closed
Power-cut, compressor wire break
Vent-pipe sensor wire break, poor connector connection
Compressor not rotating (dead lock)
Overload, over current
Failure of power transistor
Insufficient refrigerant, failure of vent-pipe sensor, control valve
closed
Failure of power supply, signal cable break, failure of
indoor/outdoor unit control device
Failure of compressor
Compressor open-phase
Failure of outdoor unit control device

Mitsubishi Heavy Industries SRK25QA-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRK25QA-S
Category	Air Conditioner
Language	English