Mitsubishi Electric LGH-F300RX5-E1 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-F300RX5-E1
LGH-F470RX5-E1
LGH-F600RX5-E1
LGH-F1200RX5-E1
Name plate
Name plate
March 2019 No. U194-C

Contents
1. Safety precautions
....................................................................... 3
2. Specifications
........................................................................... 4-5
3. Outside dimensions
.................................................................. 6-9
4. Electrical wiring diagrams ..................................................... 10-12
5. Circuit board diagram ................................................................ 13
6. Fundamentals of operation ................................................... 14-36
7. Troubleshooting
.................................................................... 37-55
8. Overhauling procedures ........................................................ 56-58
9. Parts catalog ........................................................................ 59-83
LGH-F300RX5-E1 ........................................................... 60-65
LGH-F470RX5-E1 ........................................................... 66-71
LGH-F600RX5-E1 ........................................................... 72-77
LGH-F1200RX5-E1 ......................................................... 78-83

─3 ─
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled incorrectly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result
in electric shock, fire and/or injury.)
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 electric shock.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500 V DC insulation resistance tester), and
then turn on the power.
(Inadequate insulation may result in
electric shock.)
Incorrect handling of the product may
result in serious injury or death.
Caution Incorrect handling of the product may result in serious injury
or damage to properties including buildings and equipment.
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
instructions.
(Improper connection or wiring installation
may result in electric shock and/or fire.)
Replace damaged and/or degraded parts
Be sure to replace the power cord and lead wires if
they are damaged and/or degraded.
(Failure to heed this warning may result
in electric shock and/or fire.)
Use proper parts and tools
For repair, be sure to use the parts listed in the
service parts list of the applicable model and use the
proper tools.
(Failure to heed this warning may result in
electric shock, fire and/or injury.)
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Turn off the power supply
Be sure to shut off the power supply isolator before
disassembling the unit for repair.
(Failure to heed this warning may result
in electric shock.)
Make sure that the product operates properly upon completion of repair. Clean the product and the surrounding
area, and then notify the customer of the completion of repair.
Caution for injury
Do not work at a location where you do not have a
sure footing.
(Failure to heed this caution may result in
a fall.)
Request for repair
●Inspect the grounding, and repair it if it is incomplete. Make sure that a power supply isolator or an overload
protection device is installed, if it is not installed, recommend the dealer to install one.
Be sure to follow
this instruction.
Wear gloves
Wear gloves when servicing.
(Failure to heed this caution may result in
injury to your hands from sharp metal or
other edges.)
1. Safety precautions
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Prohibited

─4 ─
2. Specifications

─5 ─

─6 ─
3. Outside dimensions
LGH-F300RX5-E1
Unit: Inch (mm)

─7 ─
LGH-F470RX5-E1
Unit: Inch (mm)

─8 ─
LGH-F600RX5-E1
Unit: Inch (mm)

─9 ─
LGH-F1200RX5-E1
Unit: Inch (mm)

─10 ─
4. Electrical wiring diagrams
LGH-F300RX5-E1
(High/Low/Extra-Low/Bypass switch)

─11 ─
LGH-F470RX5-E1, LGH-F600RX5-E1
(High/Low/Extra-Low/Bypass switch)

─12 ─
LGH-F1200RX5-E1

─13 ─
* Fan drive output voltage: Each 208 to 230 V AC
During
operation: 0 ȍ
When
stopped: ȍ
(TM4 9,10)
5 V DC
(C6) GND
(C5)
(TAB3)
LED 4 (Red)
Energized: Lit
Not
energized: OFF
(TAB1, TAB2)
12 V DC
(C4,C5)
15 V DC
(C3,C8)
LED 1 (Green)
Normal
: unlit
During
an error: blinking
(TAB5)
EA fan drive
(CN9)
Extra
High High Low
Transformer
secondary
(CN2)
(output)
11 to 20 V AC
Lossnay remote controller
(PZ-60DR-E)
and transmission cable
between Lossnay units
(TM4 1, 2)
10 to 15 V DC
Transformer
primary (input)
(CN1)
208 to 230 V AC
Fuse
(5 A/250 V)
For damper
motor drive
(CN7)
208 to
230 V AC
During an
error : 0 ȍ
Normal: ȍ
(TM3 7,8)
When SW5-6 is OFF
During Bypass
ventilation: 0 ȍ
During Lossnay
ventilation: ȍ
When SW5-6 is ON
During operation
and when the outdoor air
temperature is
23°F (-5°C) to 59°F (15°C):
0 ȍ
While stopped,
or when the outdoor air
temperature is
59°F (15°C):
ȍ
(TM3 6,7)
Thermistor
(RA) (OA)
(CN5)
LED 2 (Red)
When blinking, an M-
NET communication
error is occurred.
(The number of
blinks indicates the
details of the error)
This will be lit
steadily when there
is no (registered)
connection to another
M-NET device.
*1: Damper position detection input is only for the LGH-F300 to F600 types, and not for the LGH-F1200 type.
M-NET transmission
cable (Shielded)
(TB5 S)
For external
device connections
(TM2)
M-NET transmission cable
(M-NET controller,
power supply unit,
and City Multi indoor unit)
(TB5 A,B)
Damper motor
position detection
(CN6) *1
During Lossnay
ventilation: 12 V DC
During Bypass
ventilation: 0 V
SA fan drive
(CN10)
Extra
High High Low
Common for EA
fan drive
Common for SA
fan drive
Power supply
208 to 230 V AC
5. Circuit board diagram
Circuit board diagram and check points

─14 ─
Basic System
Basic
System
Lossnay
M-NET
Remote
controller
Mr. Slim
indoor unit
A,K
Mr. Slim
Lossnay
interlocked
signal
Mr. Slim-Lossnay
connection cable
(Included parts with
Lossnay)
A-control or
K-control remote
controller
•Lossnay can be started/
stopped by an A-control
remote controller or a
K-control remote controller.
• Lossnay High or Low fan
speed can be selected from
the A-control remote controller.
•Lossnay stand-alone opera-
tion is permitted from the
A-control remote controller.
*PZ-60DR-E cannot be used.
Level sig-
nal output
device
(other
manu-
facturer's
PAC, etc.)
or pulse
signal out-
put device
(building
control
system,
etc.)
Systems
inter-
locked
with
external
devices
(air
condi-
tioning
units)
6. Fundamentals of operation
Description of the circuit operation
(1)System Configuration
Lossnay operates through the following system.
System
Classification Details
1 Lossnay
unit
1 Remote
controller
Two
remote
control-
lers sys-
tem
1 Lossnay
unit
2 Remote
controllers
Multiple
units
system
Multiple
Lossnay
units
System Diagram
Remote controller : PZ-60DR-E
Transmission cable terminal
blocks between Lossnay unit
M-NET : M-NET transmission cable
terminal block
R : Remote controller
(PZ-60DR-E)
•One remote controller oper-
ates one Lossnay unit.
•Two remote controllers oper-
ate one Lossnay unit. (Last
touch priority operation)
•A maximum of 15 Lossnay
units can be operated by
a single remote controller.
(Group operation)
•All units will operate in the
same mode.
Features
R
Lossnay
M-NET Remote
controller Transmission cable
between the remote
controller and Lossnay
RR
Lossnay
M-NET Remote
controller
R
Lossnay
M-NET
Remote
controller
Lossnay
M-NET
Remote
controller
Lossnay
M-NET
Remote
controller
Remote controller (PZ-60DR-E)
•Lossnay is started/stopped
by a signal (*1)from an
external device.
•Having a remote control per-
mits last touch priority opera-
tion with the external device
and the remote controller.
•A maximum of 15 Lossnay
units can be operated.
*1: An uncharged a-contact,
12 V DC or 24 V DC level
signal, or an uncharged
a-contact, 12 V DC or 24 V
DC pulse signal.
R
Lossnay
M-NET
Remote
controller
Level (pulse) signal
Output device
External device
(Other manufacturer's
PAC, etc.)
Remote controller (PZ-60DR-E)
(Operation without a remote controller is also
possible.)
Mr. Slim
(A-control
or
K-control
remote
control-
ler)

─15 ─
M- NET Control
R1
Lossnay
M-NET
Remote
controller
M-NET
transmission
cable
City Multi
Indoor unit
MA
Transmission
cable between
the remote
controller and
Lossnay
Lossnay remote controller
(PZ-60DR-E)
(Operation without a remote
controller is also possible.)
System
Classification Details
Systems
inter-
locked
with
external
devices
(air
condi-
tioning
units)
Mitsubishi
City Multi
air condi-
tioner
(MA remote
controller
or ME
remote
controller)
Central
control
system
for
Lossnay
only
Central/
independ-
ent control
of multiple
Lossnay
units
System Diagram
Remote controller : Terminal block for trans-
mission cable between
PZ-60DR-E and Lossnay unit
M-NET : M-NET transmission cable
terminal block
R1 : PZ-60DR-E
When PZ-60DR-E is used
* Refer to the technical documentation for details about M-NET system design.
When PZ-60DR-E is used
• Lossnay can be interlocked
with a maximum of 16 air
conditioning units.
• Lossnay can be started/
stopped, and switched
between High and Low fan
speed by an air conditioner
remote controller.
• Lossnay stand-alone opera-
tion is permitted from an air
conditioner remote control-
ler.
• Having PZ-60DR-E permits
last touch priority opera-
tion with the air conditioner
remote controller and the
Lossnay remote controller.
• Lossnay batch/independent
(group)control is permitted
by system controller.
• Operation of Lossnay within
a group is permitted by a
Lossnay remote controller.
(PZ-60DR-E)
• One group of a maximum
of 16 Lossnay units can be
operated.
Features
Lossnay
SC Power supply
R1 R1
R1 R1
Remote controller (PZ-60DR-E)
System controller Power supply unit
Group 1 Group 2
Group 3 Group 4
LossnayLossnay Lossnay
Lossnay Lossnay Lossnay Lossnay

─16 ─
For Mr. Slim
For Lossnay independent control
Schedule timer
Group remote controller
ON/OFF remote controller
System remote controller
Centralized controller
Remote controller list
1Remote controllers
2System controllers
Rough Classification Fine Classification Product
Lossnay remote controller
M-NET
For City Multi air con-
ditioner
MA remote control-
ler
M-NET remote
controller
MA remote controller
Wireless remote controller
Compact remote controller
Compact remote controller
ME remote controller
A-control remote controller
K-control remote controller
Classification
System controller
Product
(2)Start-up process
When the power is turned on, operation will not be performed for up to 45 seconds to allow Lossnay to perform
information settings required for control purposes.
The start-up process can be checked by the blinking of LED1 in the Lossnay circuit board (1 second on/1 sec-
ond off) or the remote controller LED when the remote controller is used.

─17 ─
The remote controller “Fan Speed Adjustment” button permits High
(Extra High)/Low fan speed selection, and the “Extra Low fan speed”
button permits an Extra Low fan speed selection.
(The LGH-F1200 type does not provide Extra Low fan speed opera-
tion.)
Fixed to High (Extra High)fan speed.
System Configuration
(3)Fan control
1Fan speed control for each system
The control indicated below can be performed according to the system that is paired.
Up to two of the Lossnay remote controllers PZ-60DR-E can be used in the same group, but
they cannot be used together with a different remote controller. When using two remote con-
trollers, be sure to use the same model of remote controller.
When controlling Lossnay in M-NET control, use PZ-60DR-E.
When using PZ-60DR-E and mixing the LGH-F300 to F600 types together with the LGH-
F1200 type in a group, set the LGH-F300 to F600 types as “Main”.
Caution
Lossnay remote
controller
PZ-60DR-E
The remote controller “Fan Speed Adjustment” button permits
High (Extra High)/Low fan speed selection, and the “Extra Low fan
SPEED” button permits an extra low fan speed selection.
(The LGH-F1200 type does not provide Extra Low fan speed opera-
tion.)
Stand-alone/
multiple Lossnay
and Lossnay
remote controller:
PZ-60DR-E
A-control remote
controller
K-control remote
controller
(Remote control-
ler connection
prohibited with
Lossnay )
The A-control remote controller “Ventilation” button permits High
(Extra High)/Low fan speed selection.
(High (Extra High)/Low fan speed selection is not available from the
K-control remote controller.)
(Extra Low fan speed selection is not available from the A-control
and K-control remote controllers.)
System interlocked
with Mr. Slim
NoneLevel signal/pulse
signal
System interlocked
with the output
device
Lossnay remote
controller
PZ-60DR-E
Stand-alone/
multiple Lossnay
and Lossnay
remote controller:
PZ-60DR-E
M-NET controller The system remote controller, or centralized control remote control-
ler “Fan Speed” button or “Ventilation setting” button permits High
(Extra High)/Low fan speed selection.
(The ON/OFF remote controller and the schedule timer do not permit
fan speed selection.)
(Extra Low fan speed selection is not available from the system
remote controller or the centralized control remote controller.)
M-NET
Lossnay central
control system
ME remote con-
troller
MA remote con-
troller
The remote controller “Ventilation” button permits High (Extra High)/
Low fan speed selection.
(Extra Low fan speed selection is not available from the ME remote
controller and MA remote controller.)
M-NET
System interlocked
with City Multi
indoor units
Remote controllers
System controllers
Fan speed
Basic SystemM-NET Control

─18 ─
Extra High
/High
Fan speed
selection
Multi ven-
tilation
mode
Power
supply/
exhaust
mode
(When
operation
starts )
This switches the settable fan speed from the remote control-
ler and the system controller. Set this when there is a need for
large air volume, or when there is a long duct line.
When set to High fan speed, High/Low fan speed can be set,
and when set to Extra High fan speed, Extra High/Low fan
speed can be set.
Air supply SW2-9
: ON
Exhaust SW2-10
: O N
(Refer to page
30)
SW2-3: ON
(Refer to page
30)
When PZ-60DR-E will not be used in a system of
multiple Lossnay units, set the function selection
switches on the Lossnay circuit board for each
unit.
The fan speed display of the remote controller,
and the system controller will be the same for
either Extra High or High.
2Fan speed control by function setting
The following fan speed control can be set with PZ-60DR-E or the function selection switch (SW2) on the
Lossnay circuit board.
Function PZ-60DR-E
(Remote controller
function selection)
PZ-60DR-E Not Used
(Function selec-
tion switch)
Supply fan
speed setting
Extra High SH: L
High H: L
Exhaust fan
speed setting
Extra High SH: L
High H: L
(Refer to page
33)
Supply fan
speed setting
Multiple ventila-
tion : L
Exhaust fan
speed setting
Multiple ventila-
tion : L
(Refer to page
33)
Air supply SW2-4
: ON
Exhaust SW2-5
: ON
(Refer to page
30)
This switches the settable fan speed from the remote controller
and the system controller to a fixed Low fan speed. The sup-
ply/exhaust balance is adjusted to suit the usage environment
or the place of installation.
Power supply/
exhaust when
operation starts :
ON
(Refer to page
33)
During the first 30 minutes of operation, operation will be at
High (Extra High)fan speed. This is used when rapid ventila-
tion is desired at the time of starting operation.
After 30 minutes have elapsed since starting operation, or
when the fan speed set from the remote controller or the sys-
tem controller has been changed to something other than High
fan speed, power ventilation will be cancelled and the system
will follow the fan speed set by the remote controller or system
controller.
Details
Setting Method
Display
Multiple
units
When PZ-60DR-E will not be used in a system of
multiple Lossnay units, set the function selection
switches on the Lossnay circuit board for each
unit.
When both supply and exhaust are set to the multi
ventilation mode, due to operation restrictions
PZ-60DR-E cannot be switched to a setting other
than Low/Extra Low fan speed. Other remote con-
trollers and system controllers can change the fan
speed display; however, the fan will remain fixed
at Low fan speed.
Operation
Multiple
units
When PZ-60DR-E will not be used in a system of
multiple Lossnay units, set the function selection
switches on the Lossnay circuit board for each
unit.
During power ventilation, PZ-60DR-E will display
“POWER VENT START”. Other remote control-
lers and system controllers will display the set fan
speed, even during power supply exhaust opera-
tion.
Display
Multiple
units

─19 ─
Function
3Restrictions when switching fan speed
The following restrictions exist when the fan speed is switched.
When switching between High (Extra High)and Low fan speed, the fan will be stopped for approximately
5 seconds.
When switching between Extra Low fan speed and the other fan speeds, the fan will be stopped for ap-
proximately 10 seconds.
4Air supply fan forced stop
Under the following conditions, Lossnay will force stop of the air supply fan. However, when the following
conditions are met while operating at Extra Low fan speed, the air supply fan will stop, and the exhaust fan
will operate at Low fan speed.
(When operating at Extra Low fan speed, the air supply fan and the exhaust fan cannot be stopped sepa-
rately.)
When Mr. Slim is in defrost or stopped due to a fault, in an interlocked system with Mr. Slim that has a
duct connection with Lossnay.
(For cold inrush prevention, or falling dust prevention)
When the indoor unit is in defrost, in an interlocked system with a City Multi indoor unit that has a duct
connection with Lossnay.
(For cold inrush prevention)
When the outside temperature is between 14°F (-10°C) and 5°F (-15°C), the air supply fan repeats
10-minute stop and 60-minute running.
When the outside temperature is below 5°F (-15°C), the air supply fan repeats 20-minute stop and
10-minute running, or 20-minute stop and 20-minute running. It is based on the outdoor temperature and
the setting of the function selection switch (SW5-9) on the Lossnay circuit board. Refer to Installation
Instructions for more details.
(To prevent freezing of the Lossnay core)
(4)Ventilation mode control
Lossnay (heat exchange)ventilation or bypass (normal)ventilation is achieved by switching the air duct inside
the Lossnay unit with a damper.
1Ventilation mode
There are three control modes.
Lossnay ventilation (heat exchange ventilation)mode:
Heat exchange ventilation is performed regularly through the Lossnay core.
Bypass ventilation (normal ventilation)mode:
Ventilation is performed regularly without going through the Lossnay core.
Automatic ventilation mode:
A temperature sensor built into the unit provides automatic ventilation to a suitable ventilation mode.
In addition, energy saving ventilation is provided by interlocking with a Mr. Slim or City Multi indoor unit.
TM4 9, 0output setting
“Operation monitor with delay
function 1”: SW2-8: ON
TM3 6, 7output setting
“Operation monitor with delay
function 2”: SW5-6: ON
(Refer to page 30)
* This function cannot be set from
PZ-60DR-E.
When TM4 9, 0output settings, and TM3 6, 7output set-
tings are set to operation monitor with delay function 1 or 2,
the fan will stop after 3 minutes have elapsed from the OFF
operation when output ON (Closed)is switched to output OFF
(Open)by the Lossnay stop instruction.
Fan motor
delay stop
(Operation
monitor
with delay
function)
*Note 1
*Note 1: The fan will continue to operate even after operation is stopped with the remote controller, etc.
PZ-60DR-E
(Remote controller
function selection)
PZ-60DR-E Not Used
(Function selec-
tion switch)
Details
Setting Method

─20 ─
Fixed to automatic ventilation.
Basic System
M-NET Control
Fixed to automatic ventilation.
Lossnay remote controller
PZ-60DR-E
The “Function selector” button of the remote control-
ler permits ventilation mode switching for automatic,
Lossnay, and bypass ventilation. Bypass ventilation is
set at the time of night purge operation, and ventilation
mode switching is not possible.
Stand-alone/
multiple Lossnay
and Lossnay
remote controller:
PZ-60DR-E
M-NET controller The “Operation mode” button of the system remote
controller and the centralized controller permits ventila-
tion mode switching for automatic, Lossnay, and bypass
ventilation.
(The schedule timer, ON/OFF remote controller, and the
group remote controller do not permit ventilation mode
selection.)
M-NET
Lossnay central
control system
ME remote controller
MA remote controller
M-NET
System interlocked
with City Multi
indoor units
Up to two of the Lossnay remote controllers PZ-60DR-E can be used in the same group,
but they cannot be used together with a different remote controller. When using two re-
mote controllers, be sure to use the same model of the remote controller.
When controlling Lossnay in M-NET control, use PZ-60DR-E.
Caution
System
Lossnay remote controller
PZ-60DR-E
The “Function selector” button of the remote control-
ler permits ventilation mode switching for automatic,
Lossnay, and bypass ventilation. Bypass ventilation is
set at the time of night purge operation, and ventilation
mode switching is not possible.
Stand-alone/multi-
ple Lossnay and
Lossnay remote
controller:
PZ-60DR-E
A-control remote controller
K-control remote controller
(Remote controller connection
prohibited with Lossnay )
Fixed to automatic ventilation.System interlocked
with Mr. Slim
NoneLevel signal/pulse
signal output
device and external
device only
Remote controllers
System controllers Ventilation mode
2Damper control for each system
The control indicated below can be performed according to the system that is paired.