Mitsubishi Electric Lossnay LGH-50RVS-E Handbook page 31

Error LED1 LED2
Code (green) (red)
5501 12 CO
blinks error (Optional
components:
PZ-70CSW-E,
PZ-70CSB-E)
6201 PZ-62DR-E
circuit board
failure
6202 PZ-62DR-E
circuit board
failure
6600 6 Multiple
blinks address error
6602 2 Transmission
blinks error
(transmis-
sion proces-
sor 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
sensor The connectors for the CO
2
are disconnected.
CO sensor failure
2
Even though the CO
connected, CO
function selection switches (SW5-6
to SW5-8) on the circuit board or
the function setting (No. 66) of
PZ-62DR-E) is set as shown below.
• "PZ-70CSW-E connected" (SW5-6: ON,
SW5-7 and SW5-8: OFF, or No.66: 5)
• "PZ-70CSB-E connected" (SW5-6 and
SW5-7: ON, SW5-8: OFF, or No.66: 7)
Remote controller failure
Clock function of the remote control-
ler is not working properly.
The system contains two or more
units (*1) 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 trans-
mission 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-62DR-E is connected to the ter-
minals (TB5 [A] [B]).
Malfunction of the unit (*1) where an
error occurs
Cause
sensor
2
sensor is not
2
sensor setting (the
2
─ 31 ─
Corrective action
Check the connector connections
(CN34 (only for PZ-70CSW-E),
CN23, CN26, and CN35) on the
control circuit board.
Check the CO sensor wiring
2
according to the PZ-70CSW-E/
PZ-70CSB-E Installation and
Instruction Manual. If the problem
persists even after correcting the
wiring, replace the CO
2
When the CO sensor is not con-
2
nected, set the function selection
switches (SW5-6 to SW5-8) on the
circuit board to OFF, or the function
setting (No. 66) of PZ-62DR-E to
"1: No external fan speed control
input".
Replace the PZ-62DR-E remote
controller.
Replace the PZ-62DR-E remote
controller.
Find the units (*1) with the same
address, and set unique addresses
to these units.
Check the items described in (1)
[2].
Restart the system after complet-
ing wiring.
If the error re-occurs, check for
noise on the transmission cable.
If the above does not correct the
problem, replace the Lossnay con-
trol circuit board.
Check the wiring of the power
supply unit and the transmission
booster.
Connect PZ-62DR-E to the termi-
nals (TM4 [1] [2]).
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)
Check the unit (*1) where the error
occurs.
sensor.