Trouble Of Outdoor Unit; Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor; Checking The Indoor Electrical Equipment - Mitsubishi Electric SRK05CR-S Technical Manual

Trouble of outdoor unit

Does compressor operation?
YES
Is refrigerant amount normal?
YES
Clogged capillary tube or strainer,
etc.

(7) Phenomenon observed after shortcircuit, wire breakage on sensor

(a) Indoor unit
Operation
Sensor
mode
Room temperature
Cooling
sensor
Heat exchanger
Cooling
sensor

(8) Checking the indoor electrical equipment

(a) Indoor PCB check procedure
Is there voltage at power source?
(AC 220/230/240V)
YES
Is the fuse burnt out? (3.15 A)
NO
Replace PCB
NO
Is capacitor for compressor normal?
Is connector for compressor connection
good?
NO
Does trouble persist after charging gas?
Shortcircuit
Release of continuous compressor operation command
System can be operated normally.
NO
Inspect power source.
If the package components
YES
are not damaged, replace the
fuse and perform an operation
check again.
-
YES
YES
Replace compressor.
YES
Insufficient gas
Phenomenon
Continuous compressor operation command is not released.
(Room temperature sensor error.)
Continuous compressor operation command is not released.
(Anti-frosting, heat exchanger sensor error.)

-
'15 • SRK-T-171
[Compressor malfunction of
insufficient gas (refrigerant)]
NO
Replace capacitor for compressor.
NO
Correct connection
NO
Check if there are any places where
gas is leaking
Broken wire