Mitsubishi Electric Lossnay LGH-F300RX3-E User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
LOSSNAY
HANDBOOK
MODELS
LGH-F300RX3-E
LGH-F600RX3-E
LGH-F1200RX3-E
Nameplate
Nameplate
April 2018 No. U112-B

Contents
Safety precautions........................................................................3
1. Specifications ....................................................................... 4-5
2. Dimensions .......................................................................... 5-6
3. Wiring diagrams ................................................................... 7-8
4. Troubleshooting ................................................................. 9-22
4-1 Service Flow................................................................ 9-10
4-2 Items to Check........................................................... 11-21
4-3 Circuit Test Point............................................................. 22
5. Overhaul procedures........................................................ 23-28
5-1 Blower Parts.............................................................. 23-25
5-2 Damper Movement Motor Part (All units available)... 25-26
5-3 Circuit Board Part...................................................... 26-28
6. Parts list ........................................................................... 29-41
LGH-F300RX3-E ........................................................... 30-33
LGH-F600RX3-E ........................................................... 34-37
LGH-F1200RX3-E ......................................................... 38-41

—3—
♦♦
Turn off the power supply
Be sure to shut off the breaker before dis-
assembling the unit for repair.
(Failure to heed this warning may result in elec-
tric shock.)
♦♦
Use proper parts and tools
For repair, be sure to use the parts listed in the service
parts list of the applicable unit model and
use the proper tools.
(Failure to heed this warning may result in elec-
tric shock, fire and/or bodily injury.)
♦♦
Proper electric work
Use the electric wires designated for electric work, and
conduct electric work in accordance with the "Electric
Installation Engineering Standard," the "Indoor Wiring
Regulations," and the Installation Work
Guide.
(Incomplete connection or wiring installation may
result in electric shock and/or fire.)
♦♦
Replace damaged and/or degraded parts
Be sure to replace the power-supply cord and lead wire
in the event that they are damaged and/or
degraded.
(Failure to heed this warning may result in elec-
tric shock and/or fire.)
♦♦
Check insulation
Be sure to measure the insulation resistance once the
repair work is complete, and turn on the power supply
after verifying that an insulation resistance
of at least 10MΩis obtained.
(If an insulation problem exists, it may result in
electric shock.)
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Safety precautions
●Please be sure to read the following safety precautions thoroughly before commencing with the maintenance
work, and conduct the inspection and repair of the product in a safe manner.
●The types and levels of danger that may arise if the product is handled incorrectly are described by using the
warning symbols shown below.
♦♦
Electric shock
If you must inspect the circuitry while the
power is on, do not touch the live parts.
(Failure to heed this warning may result in elec-
tric shock.)
Caution for
electric shock
♦♦
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result in elec-
tric shock, fire and/or bodily injury.)
Prohibited
Incorrect handling of the product may result in serious injury
or death.
Warning
♦♦
Caution for bodily injury
Do not conduct any work at a location
where you do not have a sure footing.
(Failure to heed this caution may result in a fall.)
Prohibited
Be sure to follow
this instruction.
♦♦
Wear gloves
Wear gloves when conducting work.
(Failure to heed this caution may result in injury
to your hands from sharp metal or other edges.)
•Inspect the grounding, and repair it if incomplete.
●Make sure that the product operates correctly upon completion of repair. Clean the product as well as the sur-
rounding area, and then notify the customer of the completion of repair.
Incorrect handling of the product may result in serious injury
or damage to properties including buildings and equipment.
Caution
Request during repair

—4—
1. Specifications

2. Dimensions
Unit (inch)
LGH-F300RX3-E,LGH-F600RX3-E
—5—

Unit (inch)
LGH-F1200RX3-E
—6—

Symbol explanation
• PZ-41SLB-E and PZ-52SF-E cannot be used simultaneously.
M1: Motor for exhaust fan
M2: Motor for supply fan
C: Capacitor
GM: Motor for Bypass move-
ment
LS: Microswitch
TH1: Thermistor for outside air
TH2: Thermistor for return air
SW1: Switch
(Main/Sub change)
SW2,5: Switch (Function selec-
tion)
SW3: High/E.High select switch
(Exhaust fan)
SW4: High/E.High select switch
(Supply fan)
TM1: Terminal block
(Power supply)
TM2: Terminal block
(Transmission cable and
external control input)
TM3: Terminal block (Monitor
output)
TB5: Terminal block
(M-NET Transmission
cable)
S1,S2: Connector (Power sup-
ply)
TR: Control circuit trans-
former
X7: Relay contact (For opera-
tion monitor output)
X8: Relay contact (For mal-
function monitor output)
CN1: Connector
(Transformer primary)
CN2: Connector
(Transformer secondary)
CN5: Connector
(Thermistor)
CN6: Connector
(Microswitch)
CN7: Connector (Motor for
Bypass operation)
CN8-1: Tab connector
(Fan motor)
CN8-2: Tab connector
(Fan motor)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN16: Connector (High/Low
switch)
CN32: Connector (Remote
control selection)
SA1: Address setting rotary
switch
(10 digit)
SA2: Address setting rotary
switch
(1 digit)
LED1: Inspection indicator lamp
LED2: Inspection indicator lamp
LED4: Power supply indicator
lamp
LED6: M-NET indicator lamp
3. Wiring diagrams
—7—
LGH-F300RX3-E,LGH-F600RX3-E
MARK : Indicates ter-
minal block
: Connector
: Board inser-
tion connector or
fastening connec-
tor of control
board
* Connect the wires shown as dotted lines.
* Be sure to connect the grounding wire.
* Breaker should be provided by the customer.

M1: Motor for exhaust fan
M2: Motor for supply fan
C: Capacitor
GM: Motor for Bypass movement
LS: Microswitch
TH1: Thermistor for outside air
TH2: Thermistor for return air
SW1: Switch(Main/Sub change)
SW2,5: Switch (Function selection)
SW3: High/E.high select switch
(Exhaust fan)
SW4: High/E.high select switch
(Supply fan)
TM1: Terminal block (Power supply)
TM2: Terminal block (Transmission
cable and external control
input)
TM3:
Terminal block (Monitor out-
put)
TB5: Terminal block (M-NET
Transmission cable)
S1,S2: Connector (Power supply)
TR: Control circuit transformer
X7: Relay contact (For operation
monitor output)
X8: Relay contact (For malfunc-
tion monitor output)
CN1: Connector (Transformer
primary)
CN2: Connector (Transformer sec-
ondary)
CN5: Connector (Thermistor)
CN6: Connector (Microswitch)
CN7: Connector (Motor for Bypass
operation)
CN8-1: Tab connector (Fan motor)
CN8-2: Tab connector (Fan motor)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN16: Connector (High/Low switch)
CN32: Connector (Remote control
selection)
SA1: Address setting rotary switch
(10 digit)
SA2: Address setting rotary switch
(1 digit)
MARK
: Indicates terminal block
: Connector
: Board insertion connector or
fastening connector of
control board
Symbol explanation
•PZ-41SLB-E and PZ-52SF-E cannot be used simultaneously.
—8—
LGH-F1200RX3-E
* Connect the wires shown as dotted lines.
* Be sure to connect the grounding wire.
* Breaker should be provided by the customer.

4. Troubleshooting
4-1 Service Flow
Confirmation items
1Condition of trouble – remote controller dis-
play, etc.
2Frequency of trouble – date of start of opera-
tion and occurrence
3Occurrence timing
4Existence of drawings, equipment (including
controllers and equipment sold separately),
cables, wiring, and settings.
Applicable models
Lossnay
LGH-F300 to F1200RX types
Remote controller
PZ-41SLB-E
PZ-52SF-E
Trouble Mode 1 The system will not start properly.
•Check the initialization checklist from
installation to operation (table 1-1).
•Check the system checklist (table 1-2).
Trouble Mode 2 •An error code displays on the remote
controller.
•The LED of the Lossnay circuit board is
blinking.
Check with the check code list (table 2).
Trouble Mode 3 The remote controller does not operate or
operates irregularly.
The Lossnay does not operate or operates
irregularly.
Trouble Mode 4
Check with the remote controller checklist
(table 3).
Check with the Lossnay checklist (table 4).
Precautions when diagnosing malfunctions
●When removing a transistor or printed circuit board, make sure the breaker is thrown.
●When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force to the surface
mounted parts.
●When removing the circuit board, be careful of the metal edges on the board.
●When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull on the lead
wires.
●When servicing, be sure to recreate the malfunction 2 to 3 times before starting repairs.
●If a malfunction of the printed circuit board is suspected, check for disconnected wires in the print pattern, burnt parts or dis-
coloration.
●If the printed circuit board is replaced, make sure that the switch settings on the new board are the same as the old board.
—9—

Unit error
——
Error item
—«
«««
««
«
«««
«
«
«
—
«
—
«
—
«
————
—
—
—
—
« «««
—
—
«« «
«« «
—
«« ««
—
«« «
—
«« «
«
—
«« «
2 times
3 times
4 times
5 times
—
—
—
—
—
—
—
9 times
—
—
—
—
—
6 times
—
—
8 times
1 - 5
times
LED 6
turn off
—
4000/4116
*1)
3602
5101
5102
0900
6600
6607
6608
6607/6608
6602/6603/
6604
—
6608
•Cancellation
•Cancel damper operation
•Other controls as normal
• Lossnay ventilation
fixed (for “Auto”modes)
• Other controls as normal
• Lossnay ventilation
fixed (for “Auto”modes)
• Other controls as normal
•Fan: High speed
•Lossnay ventilation fixed
—
—
—
•Cancellation
—
—
•Cancellation
Fan motor
operation
device error
Damper motor
error
OA
temperature
sensor error
RA
temperature
sensor error
Test operation
Dual address
No ACK
No response
Controller
communication
error
Communication
circuit error
Polarity not set
PZ-41SLB-E
communica-
tion error
ClassificationCommunication error
Measures taken
by Lossnay
Remote
controller
display
error
code
LED 1
(green)
Display
(No. of
blinks)
LED 2
(red)
Display
(No. of
blinks)
Error
monitor
output
Reset
power
supply
Change
address
Stop
↓
Start
Error
delete
Cancellation measures
*1) “4000”is displayed on PZ-41SLB-E only.
Error List
—10—

Do the capacity of the main power supply on/off unit and wiring span meet specification?
Checkpoint
4-2 Items to Check
(1)Trouble Mode 1: The system will not start properly.
Initialization checklist from installation to operation (Table 1-1)
After checking the system, check the points below up to operation.
1
No.
2Is the specified power supplied to the Lossnay power terminal (TM1)?
3 Is the wiring length of the transmission cable within specifications?
When using PZ-41SLB-E: Overall extension within 1640 ft
When using M-NET: Maximum power supply length within 656 ft, maximum distance between ends
within 1640 ft
4 Does the transmission cable meet regulations? (Type, diameter)
5 Is the transmission cable wired at least 1 15/16 inch away from the power supply cable?
6 Are multiple transmission or signal cables wired to the same power cable duct?
7 Are multiple transmission cables wired with multi core cables?
8 Is the transmission cable connected to the terminal unit?
(PZ-41SLB-E to TM2 5, 6; M-NET to TB5 A, B)
9 Is the transmission cable securely connected to the Lossnay terminal unit?
10 When not using M-NET
If using 1 Lossnay unit, is the Main/Sub change switch (SW1) on the Lossnay circuit board set to “Main”?
If using 2 or more Lossnay units, is the Main/Sub switch set to “Main”on only one unit, and the other units are set
to “Sub”?
11 When using M-NET
Is the address switch on the Lossnay circuit board (SA1, SA2) set to the correct number?
12 When using external control input
Do the specifications of the external signal match specifications of signals that can be input to the Lossnay?
13 When the external input signal is a pulse signal
Is the pulse input switch (SW2-2) on the Lossnay circuit board set to ON?
14 When the external signal is 12V DC, 24V DC, or Mr. Slim (A-control) signal
Is it connected to 1, 2on the Lossnay external control input terminal unit (TM2)?
15 When the external signal is an uncharged a-contact signal
Is it connected to 1, 3on the Lossnay external control input terminal unit (TM2)?
16 When M-NET is not being used
Is the external input signal connected to the Lossnay set to “Main”?
17 Is the signal cable length within wiring specifications?
12V DC, 24V DC signal: Within limitation of the external device
Uncharged a-contact signal: Within 1640 ft
Mr. Slim (A-control) signal: Within 1640 ft
18 Is the signal cable wired at least 5 cm away from the power supply cable?
19 Is the output capacity of the Lossnay operation monitor/error monitor within specifications?
Operation monitor output: Maximum 240V AC/24V DC 2A, minimum 220V AC/5V DC 100 mA
Error monitor output: Maximum 240V AC/24V DC 1A, minimum 220V AC/5V DC 100 mA
20 Are the power supply cable, transmission cable, signal cable, etc., securely connected to the proper terminals?
21 Are the settings for the Mai/Sub switch, address switch, and function select switch correct?
—11—

«Check the power supply to the
Lossnay.
«Set the Main/Sub (SW1) switch
to “Main.”
«Check the length of the trans-
mission cable wiring.
«Connect the transmission cable
to TM2 5,6.
«Change to the PZ-41SLB-E
remote controller.
1
No.
Remote controller
display does not
appear.
«Power is not supplied to the Lossnay, or power
outside specifications is connected.
«When using only 1 Lossnay, the Main/Sub switch
(SW1) on the Lossnay circuit board is set to “Sub.”
«The overall wiring length of the transmission cable
is longer than specifications (longer than 1640 ft).
«The remote controller is connected to TB5 (M-NET
transmission cable).
«PZ-52SF-E is connected to the Lossnay local
remote controller.
2 Remote controller
does not operate
(Communication error
display)
«When using multiple Lossnay units, the Main/Sub
switch (SW1) on the Lossnay circuit board of the
second or following unit is set to “Main.”
«The overall wiring length of the transmission cable
is longer than specifications (longer than 1640 ft).
«Multiple transmission cables are wired with multi
core cables.
«
Set the Main/Sub switch (SW1) of
the second and following Lossnay
units to “Sub.”
«Check the length of the trans-
mission cable wiring.
«For the applied transmission
cable, wire the transmission
cables away from the other
transmission cable.
3 Interlocked operation
with external device
does not occur.
«The type of external signal does not match the
connected terminal unit (charged, uncharged, Mr.
Slim signal).
«The type of external signal does not match the
pulse input switch (SW2-2) setting (level signal,
pulse signal).
«The external device signal is not being input.
«The external device and signal cable wiring is
longer than specifications.
12V DC, 24V DC: Longer than limitations of
external device
Uncharged a-contact: Longer than 1640 ft
Mr. Slim signal: Longer than 1640 ft
«The Delayed Start mode is set at the remote con-
troller (PZ-41SLB-E).
«The ON Interlocked Operation mode or OFF
Interlocked Operation mode is set at the remote
controller (PZ-41SLB-E).
«When using multiple Lossnay units, the external
control input signal is connected to a unit with the
“Sub”setting made.
«
Check the connection to the exter-
nal control input terminal (TM2) for
the type of external signal.
« Check the type of external signal
and the setting of the pulse input
switch (SW2-2).
«Check the external device.
«Check the length of the signal
cable wiring.
«Check the Delayed Start mode
setting at the remote controller
(PZ-41SLB-E).
«Check the Interlocked Operation
mode setting at the remote con-
troller (PZ-41SLB-E).
«Connect the external control
input signal to the Lossnay unit
set to “Main.”
Symptom Cause Corrective action
System checklist
1Use this checklist when using a PZ-41SLB-E or an external device (Table 1-2-1)
—12—

« Check remote control unit number
limitations when using a power
supply unit
«Check the length of the trans-
mission cable wiring.
«Check the Lossnay address, and
set for an address corresponding
to interlocked operation.
«Check the length of the trans-
mission cable wiring.
«
Change to the PZ-52SF-E remote
controller (PZ-41SLB-E can not
be used with the M-NET).
2System checklist when using the M-NET (Table 1-2-2)
1
No.
Does not interlock with
City Multi. (The Lossnay
cannot be operated by
the ventilation switch on
the ME remote controller,
MA remote controller, or
MELANS.)
«The Lossnay is not set for interlocked opera-
tion, or is set for interlocked operation at the
wrong address.
«The length of the M-NET transmission cable
wiring from the outdoor unit or the system’s
overall wiring length is longer than specifica-
tions. (Longer than 656 ft from the outdoor unit,
longer than 1640 ft between ends.)
«PZ-41LSB-E is connected to the Lossnay local
remote controller.
2 Cannot operate using the
MELANS or Lossnay
remote controller.
«The address that has been set for the group in
MELANS and the address for the Lossnay are
different.
«The length of the M-NET transmission cable
wiring from the power supply unit or the sys-
tem’s overall wiring length is longer than speci-
fications. (Longer than 656 ft from the power
supply unit, longer than 1640 ft between ends.)
«PZ-41LSB-E is connected to the Lossnay local
remote controller.
«
Check the registered address in
MELANS.
«Check the length of the trans-
mission cable wiring.
«
Change to the PZ-52SF-E remote
controller (PZ-41SLB-E can not be
used with a M-NET system).
3 A unit should operate
independently by
MELANS or the Lossnay
remote controller, but it
interlocks with another
City Multi unit.
«It has been set for interlocked operation with
the City Multi unit.
«Cancel the interlocked operation
setting.
4 Cannot perform group
settings for the Lossnay
using MELANS, ME
remote controller, or MA
remote controller. (The
remote controller shows
“88”at the time of regis-
tration.)
«Power is not supplied to the Lossnay, or power
outside specifications is connected.
«The M-NET transmission cable is connected to
TM2 5,6.
«The transmission cable is not properly con-
nected to the MELANS or the City Multi.
«
The length of the transmission cable wiring is longer than
specifications (longer than maximum 656 ft from the
power supply unit, longer than 1640 ft between
ends.)
« Check the power for the Lossnay
and perform the registration again.
«Connect the transmission cable
to TB5 A, B.
«Check the transmission cable
connection.
«Check the length of the trans-
mission cable wiring.
5 When power is supplied
to the system, the
Lossnay remote con-
troller continues to dis-
play “HO”and does not
start. (Group registration
information disappears.)
«The Group setting was made on a Lossnay
remote controller in a system connected to a
centralised controller MELANS.
«The length of the transmission cable wiring is
longer than specifications (longer than maxi-
mum 656 ft from the power supply unit, longer
than 1640 ft between ends.)
«
In a system connected to MELANS,
make the group setting with the
MELANS (Do not make the group set-
ting with the Lossnay remote controller).
«Check the length of the trans-
mission cable wiring.
6 When power is supplied
to the system, the remote
control display goes
blank and the system
does not start.
«Over the number of units that can be controlled
with the Lossnay remote controller.
«The length of the transmission cable wiring is
longer than specifications (longer than maxi-
mum 656 ft from the power supply unit, longer
than 1640 ft between ends.)
Symptom Cause Corrective action
—13—

«Check the power to the Lossnay.
«Check the Lossnay remote con-
troller address registration with
the MELANS (“HO displays for 3
–10 minute when electricity is
supplied to the system).
«
Connect the transmission cable
to TB5 A, B.
«Check the Lossnay registration
with the Lossnay remote con-
troller.
7
No.
The power display “”
does not display when
power is supplied to the
system.
1When using City Multi and Lossnay interlocked
system (connected to the indoor unit system)
«The transmission cable is not correctly con-
nected to the Lossnay remote controller.
«The power is not turned on for the outdoor unit.
«The length of wiring for the outdoor unit’s M-
NET transmission cable is longer than specifi-
cation (longer than 656 ft).
«Check the transmission cable
connection.
«
Check the power to the outdoor unit.
«Check the length of the trans-
mission cable wiring.
8 The “HO”on the remote
controller continues to
flash when the power is
supplied to the system.
«Lossnay is Not supplied with specified power.
«The address for the Lossnay remote controller
does not have a group setting at the MELANS.
«The M-NET transmission cable is connected to
TM2 5,6.
«
For a Lossnay individual system with no
MELANS, Lossnay registration has not been
performed by the Lossnay remote controller.
9“LC 6608”displays on
the remote controller and
the Lossnay does not
operate.
«The remote controller is PZ-41LSB-E and con-
nected to the TB5 A, B.
«Change to the PZ-52SF-E
remote controller (PZ-41SLB-E
can not be used with a M-NET
system).
10 The operation specified
by the centralised con-
troller differs from the
operation of the Lossnay.
«The remote controller is PZ-41SLB-E and con-
nected to the TM2 5,6.
«Change to the PZ-52SF-E
remote controller (PZ-41SLB-E
can not be used with a M-NET
system).
2When using a Lossnay individual system or
City Multi and Lossnay interlocked system con-
nected to the central system.
«The power supply unit is not connected to the
transmission cable.
«The power to the power supply unit is not
turned on.
«The length of wiring of the M-NET transmission
cable from the power supply unit is longer than
specification (longer than 656 ft).
«Connect to the power supply
unit.
«Check the power to the power
supply unit.
«Check the length of the trans-
mission cable wiring.
Symptom Cause Corrective action
(2)Trouble Mode 2
●An error code displays on the remote controller.
●The LED of the Lossnay circuit board is blinking.
An error code displayed on the remote controller (PZ-41SLB-E, PZ-52SF-E) or the M-NET controller and blinking
or illumination of LED1 (green) or LED2 (red) on the circuit board shows the type of error. The LED blink interval
is 0.25 seconds for both on and off. The display duration is approximately 5 seconds.
Error display example: Fan motor operation device error
0.25S 0.25S 0.25S
5S
OFF
ON
—14—

1Checklist of error codes displayed on the PZ-41SLB and LED displays (Table 2-1)
LC 6608
Error code
—
LED1
(green)
—
LED 2
(red)
Lossnay
communi-
cation
error
«
When using multiple Lossnay units, the
main/sub setting has not been made
for the second unit and following units.
«Multiple transmission cables have
been wired using multi core wires.
«Transmission cable and power cable
are too close.
«Transmission cable is not securely
connected.
«The length of wiring of the transmis-
sion cable is longer than specifica-
tion (longer than 1640 ft).
«
Turn off the main power supply and set
the Main/Sub switch (SW1) (first unit to
main, second and following units to sub).
«Wire the transmission cable away
from the other transmission cable.
«
Wire the transmission cable at least 5
cm away from the power supply cable.
«Check the transmission cable con-
nection.
«Check the length of the transmission
cable wiring.
RC6608
SRC 6608
——
Communica
tion error
between
remote con-
trollers
(when 2
remote con-
trollers are
connected)
«Multiple transmission cables have
been wired using multi core wires.
«Transmission cable and power sup-
ply cable are too close.
«Transmission cable is not securely
connected.
«The length of wiring of the transmis-
sion cable is longer than specifica-
tion (longer than 1640 ft).
«Wire the transmission cable away
from the other transmission cable.
«
Wire the transmission cable at least 5
cm away from the power supply cable.
«Check the transmission cable con-
nection.
«Check the length of the transmission
cable wiring.
LC 0900
SLC 0900
——Lossnay
trial opera-
tion
«Trial operation switch on the
Lossnay circuit board (SW 2-1 or
SW 2-3) is set to ON board.
«Check the test operation switch.
LC 4000
SLC 4000
2
blinks
—
Fan motor
operation
device error
«Lossnay fan will not stop. «Replace the table.
LC 3602
SLC 3602
3
blinks
—Damper
related
error
«Damper board operation is not cor-
rect.
«Connectors for the damper unit are
not correctly connected.
«Remove the load and check or
move the damper board by hand.
«
Check the connection of the lead wire’s
connectors and the circuit con
nector.
LC 5101
SLC 5101
4
blinks
— OA thermis-
tor related
error
«Connectors for the thermistor are
not correctly connected.
«Check the connection of the lead
wires connectors and the circuit
connector.
LC 5102
SLC 5102
5
blinks
—
RA thermis-
tor related
error
«Connectors for the thermistor are
not correctly connected.
«Check the connection of the lead
wires connectors and the circuit
connector.
——— 9
blinks
—Remote
controller
communi-
cation
error
«Multiple transmission cables have
been wired using multi core wires.
«Transmission cable and power sup-
ply cable are too close.
«Transmission cable is not securely
connected.
«The length of wiring of the transmis-
sion cable is longer than specifica-
tion (longer than 1640 ft).
«Wire the transmission cable away
from the other transmission cable.
«
Wire the transmission cable at least 5
cm away from the power supply cable.
«Check the transmission cable con-
nection.
«Check the length of the transmission
cable wiring.
“Filter”blink-
ing
——
Warning to clean air
filter by comulative
operation time
«Interval for cleaning Lossnay air fil-
ter has elapsed.
«After cleaning the air filter press the
“Filter”button on the remote con-
troller 2 times.
“HO”blinking blink-
ing
—System is
starting
«
LED1 blinks at 1 second intervals during
starting operation (maximum of 45 seconds.)
«There is no error.
Symptom Cause Corrective action
*1 LC: Lossnay set to Main SLC: Lossnay set to Sub RC, SRC: remote controller (PZ-41SLB-E)
*2 Because the LGH-F1200RX type is loaded with 2 control circuit units, “SLC”may display even with only 1 Lossnay.
When “SLC”displays, check and perform maintenance on the upper side circuit.
—15—

2Checklist of error codes displayed on the PZ-52SF-E, M-NET controllers, and LED displays (Table 2-2)
6600
Error code
—
LED1
(green)
6
blinks
LED 2
(red)
Multiple
address error
« There is another unit with the same
address setting.
«Check the addresses of devices in
the system.
6607
6608
—8
blinks
No ACK error
No answer
error (M-
NET com-
munication
error)
«
Power supply to Lossnay is not turned on.
«Lossnay address was changed.
«Multiple transmission cables have
been wired using multi core wires.
«Transmission cable is not securely
connected.
«
The length of wiring of the transmission
cable is longer than specifications (longer
than maximum 656 ft from the power sup-
ply unit, longer than 1640 ft between ends).
«Check the power to the Lossnay.
«Check the Lossnay address.
«Wire the transmission cable away
from the other transmission cable.
«Check the transmission cable con-
nection.
«Check the length of the transmission
cable wiring.
0900 ——Lossnay
trial opera-
tion
«Trial operation switch on the
Lossnay circuit board (SW 2-1 or
SW 2-3) is set to ON.
«Check the trial operation switch.
4116 2
blinks
—
Fan motor
operation
device error
«Lossnay fan will not stop. «Replace the table.
3602 3
blinks
—Damper
related
error
«Damper board operation is not cor-
rect.
«Connectors for the damper unit are
not correctly connected.
«Remove the load and check or
move the damper board by hand.
«
Check the connection of the lead wires
connectors and the circuit connector.
5101 4
blinks
— OA thermis-
tor related
error
«Connectors for the thermistor are
not correctly connected.
«Check the connection of the lead
wires connectors and the circuit
connector.
5102 5
blinks
—
RA thermis-
tor related
error
«Connectors for the thermistor are
not correctly connected.
«Check the connection of the lead
wires connectors and the circuit
connector.
6602
6603
6604
—1 - 5
blinks
Communic
ation cir-
cuit section
error
«Error with transmission cable.
«Controller where error originally
occurred is defective.
«Lossnay board is defective.
«Check transmission cable relations.
«Check the controller where the error
occurred.
«Replace the circuit board.
——— — Lit No M-NET
connection
information
«Lossnay does not have Group set-
ting (registration) made.
«
Check the Lossnay address and con-
firm that the group setting is made.
Filter blinking —— Warning to clean air
filter by comulative
operation time
«Interval for cleaning Lossnay air fil-
ter has elapsed.
«After cleaning the air filter press the
“Filter”button on the remote con-
troller 2 times.
——— Lit —In delayed
start oper-
ation
«Delayed start operation is set at the
function select switch (SW 5-1) on
the Lossnay circuit board.
«There is no error.
——— LED6 (red)
off
No power
to M-NET
transmis-
sion cable
«Power supply is not supplied to the
M-NET transmission cable.
«
Wiring length of the transmission cable
is from the power supply unit or the out-
door unit is longer than specification
(maximum extension 656 ft).
«Check the connection of the power
supply unit, outdoor unit and trans-
mission cable.
«Check the length of the transmission
cable wiring.
Symptom Cause Corrective action
*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.
*2 Because the LGH-F1200RX type is loaded with 2 control circuit units, 1 Lossnay unit has 2 addresses. Check and perform
maintenance on the table related to the address set at the address switch (SA1, SA2).
—16—

(3)Trouble Mode 3:
The remote controller does not operate or operates irregularly.
1Checklist for when using the PZ-41SLB-E (Table 3-1)
2Checklist for when using PZ-52SF-E (Table 3-2)
1
No.
Nothing displays on the
LCD.
«Transmission cable is connected to the wrong
terminal
«No Lossnay is set to “Main.”
«Power supply to the Lossnay is not turned on.
«Lossnay is connected to a power supply with a
rating outside specification.
«Transmission cable is not securely connected.
«
The length of wiring of the transmission cable is
longer than specification (longer than 1640 ft).
« Check the transmission cable
connection (connected to 5,6
of terminal unit TM2 on the
Lossnay board).
«Turn off the main power supply
and set the Main/Sub switch
(SW1) (first unit to main, second
and following units to sub).
«
Check the power supply to the Lossnay.
«Check the power supply.
«Check the transmission cable
connection.
«Check the length of the trans-
mission cable wiring.
2 Starts or stops, or the
display changes, by
itself.
«Multiple transmission cables have been wired
using multi core wires.
«Transmission cable and power supply cable
are too close.
«
Wire the transmission cable away from
the other transmission cable.
« Wire the transmission cable at least 5
cm away from the power supply
cable.
3 Displays a error code
that is not in the check
list.
«Letters on the remote controller LCD are dim.
«The release of the Delay Start button or the
Filter Reset button is not good.
«Replace the remote control.
«Replace the remote control.
4 Cannot stop the Lossnay
with the remote controller
(display shows “Interlocked”).
«External priority ON/OFF setting is made. «Check the interlocked operation
mode setting.
5 Cannot switch fan speed
with the remote con-
troller.
«High/Low change input (CN16) is ON.
«
The function select switch (SW2-4.5) on the
Lossnay circuit has the fixed high or fixed low
speed set.
«Check the High/Low change
input (CN16).
«Check the function select switch
(SW 2-4.5)
6 Lossnay operates when
the main power supply
turns on and the remote
controller displays.
«Main power supply was cut during Lossnay
operation.
«Stop the Lossnay with the
remote controller, then wait at
least 10 second and turn off the
main power supply .
Symptom Cause Corrective action
1
No.
Nothing displays on the
LCD.
«Transmission cable is connected to the wrong
terminal
«There is no power supply unit (for Lossnay
only systems).
«The power supply unit is not turned on.
«Transmission cable is not securely connected.
«Wiring length of the transmission cable is from
the power supply unit or the outdoor unit is
longer than specifications (maximum extension
656 ft).
«Check the transmission cable
connection (connected to A, B
of terminal unit TB5 on the
Lossnay board).
«Install the power supply unit.
«Check the power to the power
supply unit.
«Check the transmission cable
connection.
«Check the length of the trans-
mission cable wiring.
Symptom Cause Corrective action
—17—

«After supplying power to the sys-
tem, HO blinks for a maximum of
about 10 minutes.
(This is not an error.)
«
Make the group setting (registra-
tion). If using a system with a cen-
tralised controller, register at the
centralised controller. If there is only
the Lossnay remote controller, reg-
ister at the remote controller.
« Check the group setting at the
MELANS.
«Check the power supply to the
Lossnay.
«Check the power supply.
«Check the transmission cable
connection (connected to A, B
of terminal unit TB5 on the
Lossnay board).
«Check the Lossnay address.
«If the board has been replaced,
reset the group settings.
«Check the length of the trans-
mission cable wiring.
2
No.
Displays “HO”and does
not start.
«It is less than 10 minutes since the power was
supplied to the system.
«Group setting (registration) has not been
made.
«
Remote control address has not been registered
in the group setting by the
centralised controller.
«Power supply to the Lossnay is not turned on.
«Lossnay is connected to a power supply with a
rating outside specification.
«Lossnay transmission cable connection termi-
nal is wrong.
«Lossnay address was changed.
«Lossnay board was changed.
«
The length of wiring of the transmission cable is longer
than specifications (longer than maximum 656 ft from the
power supply unit, longer than 1640 ft between ends).
3 Cannot register the
Lossnay from the remote
controller or the con-
troller.
«Power supply to the Lossnay is not turned on.
«Lossnay is connected to a power supply with a
rating outside specification.
«Transmission cable to the Lossnay is not con-
nected.
«Lossnay transmission cable connection termi-
nal is wrong.
«Lossnay address is wrong.
«
The length of wiring of the transmission cable is longer
than specifications (longer than maximum 656 ft from the
power supply unit, longer than 1640 ft between ends).
«Check the power supply to the
Lossnay
«Check the power supply.
«Check the transmission cable
connection.
«Check the transmission cable
connection (connected to A, B
of terminal unit TB5 on the
Lossnay table).
«Check the Lossnay address.
«Check the length of the trans-
mission cable wiring.
4
Starts or stops, or the dis-
play changes, by itself.
«Set for interlocked operation with City Multi. «Cancel interlocked operation set-
ting.
5
Displays a error code that
is not in the checklist.
«Letters on the remote controller LCD are dim. «Replace the remote controller.
6
Cannot stop the Lossnay
with the remote controller
(display shows “Central”).
«“Cancel Operation”setting is made from the
MELANS.
«External priority ON/OFF setting is made.
«Remote/nearby switch input (CN32) is set to
“Remote.”
«Check the settings of the
MELANS.
«Check the interlocked operation
mode setting.
«Check the remote/nearby
change input (CN32).
Symptom Cause Corrective action
—18—

(4)Trouble Mode 4: The Lossnay does not operate or operates irregularly.
1Lossnay checklist (Table 4).
1
No.
The fan does not operate.
The fan does not operate
normally.
«Connectors for the fan connection or connec-
tors for the control circuit section connection
are not secure.
«Power supply is not supplied to the Lossnay, or
power outside specifications is connected.
«Lossnay group setting is not made by using the
M-NET. (LED2 lights)
«Check the lead wire connectors
and the control circuit section
connectors.
«Check the power supply
«
Check the Lossnay address and
the group setting (LED2 lights when
not using M-NET. This is no error.)
3 Fan will not stop. «The trial operation switch (SW 2-1) is ON. «Check the test operation switch
(SW2-1).
4 Lossnay operates when
main power is turned on.
«The PZ-41SLB-E is being used.
«
By using the M-NET, the power supply ON/OFF
setting is set to ON at the function select switch
(SW 2-6) on the Lossnay circuit board.
« By using the M-NET, the automatic recovery fol-
lowing power supply interruption (refer to page
168) setting is made at the function select
switch (SW 5-4) on the Lossnay circuit board.
« When the main power supply is
turned off while the Lossnay is
operating from the remote con-
troller, the Lossnay will resume
operation when the main power is
turned back on (this is no error).
«Check the power supply ON/OFF
setting of the function select
switch (SW2-6).
«Check the automatic recovery
following power supply interrup-
tion setting of the function select
switch (SW5-4).
2 Interlocked operation
with external device
(air conditioner) does not
occur.
«The type of external signal does not match the
connected terminal unit (charged, uncharged,
Mr. Slim signal).
«The type of external signal does not match the
pulse input switch (SW2-2) setting (level sig-
nal, pulse signal).
«The external device signal is not being input.
«The external device and signal cable wiring is
longer than specifications
(12V DC, 24V DC:
Longer than limitations
of external device
Uncharged a-contact: Longer than 1640 ft
Mr. Slim signal: Longer than 1640 ft)
«The Delayed Start mode is set at the remote
controller (PZ-41SLB-E) or the function select
switch (SW 5-1) on the Lossnay circuit board.
«The ON Interlocked Operation mode or OFF
Interlocked Operation mode is set at the
remote controller (PZ-41SLB-E) or the function
select switch (SW 5-7,8) on the Lossnay circuit
board.
«When using multiple Lossnay units, the exter-
nal control input signal is connected to a unit
with the “Sub”setting made.
«In a group of multiple Lossnay units with the M-
NET, the external control input signal is con-
nected to a Lossnay unit other than the one
with the smallest address.
«There is a communication error with the
remote controller or controller.
Symptom Cause Corrective action
«Check the external signal type
and the external control input ter-
minal (TM2) connection.
«Check the external signal type
and the pulse input switch (SW2-
2) setting.
«Check the external device.
«Check the wiring length of the
signal cable.
«
Check the delayed start settings of
the remote controller (PZ41SLB-E)
and the function select switch
(SW5-1).
« Check the interlocked operation
mode settings of the remote con-
troller (PZ41SLB-E) and the func-
tion select switch (SW5-7, 8).
«Connect the external control
input signal to the Lossnay set to
“Main.”
«Connect the external control
input signal to the Lossnay in the
group with the lowest address.
«Check the remote controller or
controller.
—19—

5
No.
Supply air fan periodical-
ly stops operating.
«When the outdoor air temperature is 14°F or
less, operation stops after a fixed period of
about 10 minutes to keep the Lossnay Core
from freezing. (Cold weather area spec)
«When connected to a Mr. Slim or a City Multi
by a duct, operation stops when the air condi-
tioner is defrosting.
«This is no error.
«This is no error.
6 Takes in air from out-
doors during interlocked
operation with a Mr. Slim
or a City Multi, but supply
air fan doesn’t stop oper-
ating when defrosting.
«The indoor unit’s outside air intake selection is
invalid.
«Set the outdoor air intake selec-
tion of a indoor unit to “ON.”
7 The supply air fan and
exhaust fan both periodi-
cally stop operating.
«When connected to Mr. Slim or City Multi by a
duct and the function select switch (SW 5-3) on
the Lossnay circuit board is ON, operation
stops when the air conditioner is defrosting.
«Check the function select switch
(SW5-3).
8 Fan speed will not
change.
«The High/Low switching extermary input
(CN16) is set to ON.
«
The function select switch (SW2-4.5) on the Lossnay cir-
cuit board is set to the high fixed or low fixed fan speed.
«The trial operation switch (SW2-1) is turned
ON.
«Check the High/Low change
input (CN16).
«Check the function select switch
(SW2-4,5).
«Check the trial operation switch
(SW2-1).
9 Damper board does not
operate.
«The outside air temperature is less than 46.4°F.
«The damper board operation is defective.
«The thermistor related connectors are not
securely connected.
«The damper related connectors are not secure-
ly connected.
«The trial operation switch (SW2-1 or SW2-3) is
turned ON.
«When using the remote controller to change
ventilation mode, there may be a delayed start
of up to 30 seconds depending on the timing.
«
Check the outdoor air temperature.
« Remove the load and check or
move the damper board by hand.
«Check the connections of the
lead wire connectors and the cir-
cuit connectors.
«Check the connections of the
lead wire connectors and the
control circuit connectors.
«Check the trial operation switch
(SW2-1 or SW2-3).
«This is no error.
10
Operation monitor output
is late with regard to exter-
nal control input ON/OFF.
«When using the PZ-41SLB-E there is a maxi-
mum delay of 7 seconds, or without using
there is a maximum delay of 3 seconds.
«
This is no error.
11 Operation monitor output
is OFF during operation.
«When the function select switch (SW 5-2) on
the Lossnay circuit board is ON, for operation
monitor output for interlocked operation with
the supply air fan, it turns OFF when the out-
side air is 14°F or less or when the air condi-
tioner is defrosting.
«
Check the function select switch
(SW5-2).
12 Delayed start operation
does not work when
Delayed start is set.
«When using the PZ-41SLB-E, the circuit func-
tion select switch is set for delayed start.
«
Set delayed start at the remote con-
troller (the circuit board switch is not in
effect when using the PZ-41SLB-E).
13 Lossnay does not operate when
power is on even when the
power on/off setting is made.
«Using the PZ-41SLB-E. «The power supply ON/OFF set-
ting is not in effect when using
PZ-41SLB-E.
14 Interlocked operation is
different from the set-
tings.
«When using the PZ-41SLB-E, the circuit func-
tion select switch is set for interlocked opera-
tion.
«Set interlocked operation at the
remote controller (the circuit
board switch is not in effect when
using the PZ-41SLB-E).
Symptom Cause Corrective action
—20—