Mitsubishi Electric SRK19CIS, Техническое руководство

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Continuous compressor operation command is not released.
Continuous compressor operation command is not released.
(Anti-frosting)
Abnormality of outdoor unit
[Compressor malfunction of
insufficient gas (refrigerant)]
Does compressor operation? Is capacitor for compressor normal?
Replace compressor.
Replace heat exchanger sensor
Insufficient gas
Is refrigerant amount normal?
Is heat exchanger sensor resistance
value good?
Is connector for compressor connection
good?
Does trouble persist after charging gas?
Clogged capillary tube or strainer,
defective EEV, etc.
Replace capacitor for compressor.
Correct connection
Check if there are any places where
gas is leaking
YES
YES
NO NO
NO
NO
NO
NO
YES
YES
YES
YES
(b) Outdoor unit
Phenomenon
Sensor
Shortcircuit Broken wire
Cooling System can be operated normally.
Cooling System can be operated normally.
Cooling
Operation
mode
System can be operated normally.
System can be operated normally.
Compressor stop
Heat exchanger
sensor
Outdoor air
temperature sensor
Discharge pipe
sensor Compressor overload protection is disabled.
(Can be operated.)
(7) Phenomenon observed after shortcircuit, wire breakage on sensor.
(a) Indoor unit
Phenomenon
Sensor
Shortcircuit Broken wire
Cooling
Release of continuous compressor operation command
Compressor stop.
Cooling
(Abnormality of outdoor unit)
Operation
mode
Room temperature
sensor
Heat exchanger
sensor
Humidity Sensor Cooling
in the table below.
in the table below.
Humidity sensor operation
Humidity sensor assembly
Failure mode Control input circuit reading Air conditioning system operation
Disconnected wire Humidity reading is 0% Operates in the Dry region
Disconnected wire Humidity reading is 0% Operates in the Dry region
Disconnected wire Humidity reading is 0% Operates in the Dry region
and are short
Humidity reading is 100% Operates in the Cooling region.
circuited
Disconnected
wire
Short
Circuit
Remark: Do not perform a continuity check of the humidity sensor with a tester. If DC current is applied, it
could damage the sensor.
Humidity sensor
element
Connector
(CnF)
1
1
1 1
1
2
2
12