Chigo CMV-50V9A-S, Руководство по обслуживанию

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6.3 The malfunction oindoor and outdoor unit
（
1
）
The common malfunction code analysis and solutions!
The fault
code
The fault content The reason of fault and its solutions
F1 The communication fault
1
、
The communication wire is broken off. Please check
whether the wire is disentwined ;
2
、
Please check whether the electrical control board is
damaged. It should be replaced when it is damaged;
3
、
Please check whether the power ground wire is reliable;
4
、
Please check whether the unit is abnormal caused by the
external interference. If it is, then find the interfering
sources, and remove them.
F2
The indoor temperature
sensor fault
1
、
Check whether the resistance of sensor is normal,
otherwise replace it;
2
、
Check whether the sensor wire is short circuit or open
circuit, and whether the plug is well contacted, whether
there is welding off or rosin joint on the electric control
board, repair it if there is any above;
3
、
When the 1 and 2 are both normal, then the component
or integrated circuit is damaged, the electric control board
should be replaced.
F3
The indoor coil
temperature sensor fault
1
、
Check whether the resistance of sensor is normal,
otherwise replace it;
2
、
Check whether the sensor wire is short circuit or open
circuit, and whether the plug is well contacted, whether
there is welding off or rosin joint on the electric control
board ,repair it if there is any above;
3
、
When the 1 and 2 are both normal, then the component
or integrated circuit is damaged, the electric control board
should be replaced.
F4
Indoor PG motor fault
(tap motor hasn’t so
breakdown )
1
、
Check whether the contact of the plug of the motor wire
and socket is well. Please make sure it is well contacted;
2
、
Check whether the indoor motor has damaged, the
motor should be replaced when it is damaged;
3
、
Check whether the controllable silicon and other
components on the electric control board have damaged
，
replace the controllable silicon or electric control board
when they are damaged;
4
、
Check whether the indoor fan is unobstructed when
running, please fix the indoor fan again when it is
obstructed.
F5 IPM protection
1
、
Check whether the supply voltage is out of ranging from
150 to 270V(overvoltage and undervoltage protection);
Measuring the actual current, if the current is greater than
the rated current of 2A,it is over-temperature protection;
If the above are normal, that is IPM module internal circuit
fault protection, so please replace the IPM module.
F6 The outdoor sensor fault
1
、
Check whether the resistance of sensor is normal,
otherwise replace it;
2
、
Check whether the sensor wire is short circuit or open
circuit, and whether the plug is well contacted, whether
there is welding off or rosin joint on the electric control
board, repair it if there is any above;
3
、
When the 1 and 2 are both normal ,then the component
or integrated circuit is damaged, the electric control board
should be replaced.
F7 The outdoor coil
1
、
Check whether the resistance of sensor is normal,