Mitsubishi Electric LGH-F300RVX-E Handbook page 32

Error LED1 LED2
code (Green) (Red)
5102 5 Indoor air
blinks (RA) therm-
istor related
error
6201
PZ-61DR-E
circuit board
error
6202 PZ-61DR-E
circuit board
error
6600 6 Multiple ad-
blinks dress error
6602 2 Transmission
blinks error
(transmission
processor
hardware
error)
*1 This refers to devices assigned an address number in MELANS such as the Lossnay unit, City Multi indoor
unit, City Multi outdoor unit, or system controller.
Symptom
Faulty connection of the thermistor
connector (CN5) on the control circuit
board
Thermistor failure
Remote controller failure
(Data cannot be read properly from
nonvolatile memory.)
Remote controller failure
(The clock function does not work
properly.)
The system contains two or more
units (*1) set with the same address
in the same M-NET transmission
cable line.
Faulty connection of the M-NET
transmission cable
Wiring was performed with power
•
still supplied to the M-NET transmis-
sion cable.
Accidental communication error
•
Power is supplied to the same trans-
mission cable from two or more
power supply units.
The power supply unit is connected
to the TB3 terminal of the transmis-
sion booster.
PZ-61DR-E is connected to the ter-
minals (TB5 [A] [B]).
Malfunction of the unit (*1) where an
error occurs
Cause
─ 32 ─
Corrective action
Check the connector (CN5) connec-
tion.
Disconnect the connector (CN5),
and check the resistance of the
thermistor.
If the equivalent thermistor re-
sistance differs greatly from the
ambient temperatures, replace the
thermistor.
(See (5) Temperatures and thermis-
tor resistance table (page 36).)
Replace the remote controller.
Replace the remote controller.
Find the units (*1) set with the same
address, and set unique addresses
to these units.
Check the items described in (1) [2].
Restart the system after completing
wiring.
If the error re-occurs, check for
noise on the transmission cable.
If the above does not correct the
problem, replace the Lossnay circuit
board.
Check the wiring of the power
supply unit and the transmission
booster.
Connect PZ-61DR-E to the termi-
nals (TM4 [1] [2]).
(See the Lossnay technical manual.)
Check the unit (*1) where the error
occurs.