Mitsubishi Electric LGH-250RVXT-E Handbook page 28

Error LED1 LED2
Code (green) (red)
4116 2 Abnormal
blinks rotation of the
exhaust fan
motor (inside)
(Centrifugal fan
does not work,
insufficient
motor speed,
excessive
motor speed,
or rotation
detected when
operation is
stopped)
6 Abnormal
blinks rotation of the
supply fan mo-
tor (outside)
(Centrifugal fan
does not work,
insufficient
motor speed,
excessive
motor speed,
or rotation
detected when
operation is
stopped)
Symptom
<For LGH-150/200RVXT-E>
Faulty connection of the exhaust fan
motor (inside) connector (CN9) on
the Power circuit board 1
<For LGH-250RVXT-E>
Faulty connection of the exhaust fan
motor (inside) connector (CN9) on
the Top right power circuit board
<For LGH-150/200RVXT-E>
Faulty connection of the connectors
(CN18 - CN118 and CN19 - CN119)
between the control circuit board and
Power circuit board 1
<For LGH-250RVXT-E>
Faulty connection of the connectors
(CN18 - CN118 and CN19 - CN119)
between the control circuit board and
Top right power circuit board
The model selection switch (SW6) is
not set correctly.
The temperature around the product
is high.
The motor and centrifugal fan are not
fixed securely.
Deformed centrifugal fan
Foreign objects around the centrifu-
gal fan
Fan motor failure
Circuit board failure
<For LGH-150/200RVXT-E>
Faulty connection of the supply fan
motor (outside) connector (CN10) on
the Power circuit board 2
<For LGH-250RVXT-E>
Faulty connection of the supply fan
motor (outside) connector (CN10) on
the Bottom left power circuit board
<For LGH-150/200RVXT-E>
Faulty connection of the connectors
(CN21 - CN121) between the control
circuit board and Power circuit board 2
<For LGH-250RVXT-E>
Faulty connection of the connectors
(CN21 - CN121) between the control
circuit board and Bottom left power
circuit board
Cause
─ 28 ─
Corrective action
Check the connector (CN9) con-
nection.
Check the connector (CN9) con-
nection.
Check the connector connections
(CN18 - CN118 and CN19 - CN119).
Check the connector connections
(CN18 - CN118 and CN19 - CN119).
Make the SW6 setting appropriate
for the model. (See chapter 7. (11)
Setting status record (page 51).)
Use the product at a temperature
of 40°C or lower.
Check the installation state of the
motor and centrifugal fan, and fix
them securely.
Replace the centrifugal fan.
Check the air course and around
the centrifugal fan, and remove
any foreign matter.
Replace the motor. (See page 16.)
Replace the circuit board.
Check the connector (CN10) con-
nection.
Check the connector (CN10) con-
nection.
Check the connector connections
(CN21 - CN121).
Check the connector connections
(CN21 - CN121).