Mitsubishi Electric Lossnay LGH-15RX4-E Handbook page 28

Error code LED1 LED 2
*1
(green) (red)
5101 4 —
blinks
5102 5 —
blinks
3126 8 —
blinks
6602 — 1 - 5
blinks
6603
6604
——— — Lit
Filter blinking — —
——— Lit —
——— LED6 (red)
off
*1 The letters "LC" that display with the error code show a Lossnay unit type, and the number in the third column shows the
address.
Symptom
« Connectors for the thermistor are
OA thermis-
tor related not correctly connected.
error
« Connectors for the thermistor are
RA thermis-
tor related not correctly connected.
error
« In order that the OA temperature
Pre-heat
error might not rise up, intermittent opera-
tion started.
« After turnig ON the pre-heat output
(X8), when the temprature become
larger than 15
utes.
« SW5-6 ON without preheating
installation
Communic « Error with transmission cable.
ation cir-
« Controller where error originally
cuit section
occurred is defective.
error
« Lossnay board is defective.
« Lossnay does not have Group set-
No M-NET
connection ting (registration) made.
information
« Interval for cleaning Lossnay air fil-
Warning to clean air
filter by comulative ter has elapsed.
operation time
« Delayed start operation is set at the
In delayed
start oper- function select switch (SW 5-1) on
ation the Lossnay circuit board.
« Power supply is not supplied to the
No power
to M-NET M-NET transmission cable.
transmis-
sion cable
« Wiring length of the transmission
cable is from the power supply unit
or the outdoor unit is longer than
specification (maximum extension
200 m).
Cause
˚C within 15 min-
— 28 —
Corrective action
« Check the connection of the lead
wires connectors and the circuit
connector.
« Check the connection of the lead
wires connectors and the circuit
connector.
« Check whether the heater power is
supplied. Check whether the wiring
is correct. If not above-mentioned,
the heater capacity is too small. The
heater capacity needs too be looked
again.
« Since the heater capacity is too large,
the OA temperature rises up too
much. The heater capacity needs to
be looked again.
« Turn SW5-6 OFF, when no preheat-
ing installation.
« Check transmission cable relations.
« Check the controller where the error
occurred.
« Replace the circuit board.
« Check the Lossnay address and
confirm that the group setting is
made.
« After cleaning the air filter press the
"Filter" button on the remote con-
troller 2 times.
« There is no error.
« Check the connection of the power
supply unit, outdoor unit and trans-
mission cable.
« Check the length of the transmission
cable wiring.