Mitsubishi Electric LGH-F300RVX-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 ENERGY RECOVERY VENTILATOR
HANDBOOK
MODELS
LGH-F300RVX-E
LGH-F470RVX-E
LGH-F600RVX-E
LGH-F1200RVX-E
December 2019 No. U285
Remote controller (Optional)
PZ-61DR-E
PZ-43SMF-E
Filter (For replacement)
PZ-50RF8-E
PZ-80RF8-E
PZ-100RF8-E
Nameplate
Nameplate

Contents
Contents
1. Safety precautions .......................................................................... 3
2. Changed points............................................................................... 4
3. Specifications.................................................................................. 4
4. Outside dimensions ........................................................................ 5
5. Electrical wiring diagrams ............................................................... 8
6. Circuit board diagrams.................................................................. 10
7. Troubleshooting ............................................................................ 12
7-1 Service flowchart ....................................................................................12
7-2 Check details ..........................................................................................13
8. Overhauling procedures................................................................ 37
9. Parts catalog ................................................................................. 50
LGH-F300RVX-E ..........................................................................................51
LGH-F470RVX-E ..........................................................................................59
LGH-F600RVX-E ..........................................................................................67
LGH-F1200RVX-E ........................................................................................75
3
4
4-5
5-7
8-9
10-11
12-36
12-13
13-36
37-49
50-82
51-58
59-66
67-74
75-82

─ 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 improperly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
( Failure to observe 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 observe this warning may result
in electric shock. )
Check insulation
Upon completing repair work, always measure the insula-
tion 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.)
Improper handling of the product may
result in serious injury or death.
Caution
Improper handling of the product may result in 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 your
local "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 observe 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 catalog of the applicable model and
use the proper tools.
( Failure to observe 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 observe 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 observe this caution may result
in a fall. )
Notes for servicing
● Inspect the earth condition, and repair it if it is incomplete. Make sure that a power supply isolator and an over-
load protection device are installed. If they are not installed, recommend the customer to install them.
Be sure to follow
this instruction.
Wear gloves
Wear gloves when servicing.
(Failure to observe 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. Changed points
New model Former model Changes from the former model
LGH-F300RVX-E LGH-F300RX5-E Circuit board: Newly designed
Motor: Changed from AC motor to DC motor
Operation in extremely cold regions: Unavailable
LGH-F470RVX-E LGH-F470RX5-E
LGH-F600RVX-E LGH-F600RX5-E
LGH-F1200RVX-E LGH-F1200RX5-E
3. Specifications
Model name
Running
current
(A)
Input
power
(W)
Air volume Static pressure Exchange efficiency (%) Noise
(dB)
Dia. of the
centrifugal
fan
(Inch (mm))
Weight
(CFM)
(CMH) (W/CFM) (in W.G) (Pa) Temperature
Enthalpy
Below
the unit
(lbs) (kg)
Heating Cooling
LGH-F300RVX-E 1.06 155 300 510 0.52 0.46 115 65.5 63.0 50.0 34.0 8 3/4 (220) 75 34
LGH-F470RVX-E 2.15 348 470 799 0.74 0.60 150 69.0 64.0 51.0 34.5 9 5/8 (245) 110 50
LGH-F600RVX-E 2.70 438 600 1019 0.73 0.66 164 67.0 64.0 50.0 37.0 9 5/8 (245) 123 56
LGH-F1200RVX-E 5.40 880 1200 2039 0.73 0.59 147 67.0 64.0 50.0 41.0 9 5/8 (245) 251 114
* The above values apply during energy recovery ventilation when the fan speed is set to Fan speed 4 at the
rating pressure loss and 230 V / 60 Hz.
* For the specifications at the other frequency or voltages, see the spec. sheets.
* The values given in the table for the noise level reflect the levels measured at a position 4.9 feet (1.5 m)
immediately below the unit in an anechoic chamber.
* Noise change or increase may occur because of the Bypass-Automatic function or Automatic fan speed
change by timer setting and/or other functions.
* Temperature Exchange efficiency (%) are average of summer and winter condition.
* Mitsubishi Electric measures products according to Japan Industrial Standard (JIS B 8628:2003), therefore
characteristic values are measured by chamber method.
* On-site commissioning measurements by pitot tube method could be as much 20% difference from JIS test
room conditions. If the measuring point is close to sources of turbulence like bends, contractions and damp-
ers, etc., it is difficult to measure air volume correctly. A straight duct length more than 10 D (D=duct diame-
ter) from the source of turbulence is recommended for correct measurement. On-site measurement should
therefore be measured in accordance with BSRIA guideline (Commissioning Air System. Application proce-
dures for buildings AG3/89.3 (2001))
Model name LGH-F300RVX-E, LGH-F470RVX-E, LGH-F600RVX-E, LGH-F1200RVX-E
Heat exchange system Energy recovery ventilating system
Heat exchanger material Special treated paper plate heat exchanger
Cladding Galvanized steel sheet
Heat insulation material Self-extinguishing urethane foam
Motor EC motor
Filter Non-woven fabrics filter (EU-G3)
Surrounding air condition Shall be between 14°F (-10°C) and 104°F (40°C), 80%RH or less
Suction air condition Shall be lower than 104°F (40°C), 80%RH
Supply fan operation under
low outdoor temperature
14°F (-10°C) to 5°F (-15°C) : Intermittent operation 60 min ON, 10 min OFF
5°F (-15°C) or less: Intermittent operation 55 min OFF, 5 min ON
Function Energy recovery ventilation/Bypass ventilation, Fan speed 1, 2, 3, 4
Electrical power supply Single phase 208-230 V / 60 Hz
Insulation resistance 10 MΩ or more
Dielectric strength 1000 V AC 1 minute

─ 5 ─
Remote controller
Model name PZ-61DR-E PZ-43SMF-E
Power supply requirement 12 V DC (Supplied from Lossnay unit)
Power consumption 0.3 W
Transmission cable Non polarized 2-wire (AWG 22 (0.3 mm2) sheathed cable)
Total wiring length 219 yd. (200 m) maximum
Number of controllable Lossnay units 15 Lossnay units maximum (Max. 2 remote controllers installable)
Environmental condition Temperature: 32 to 104ºF (0 to 40°C)
Humidity: 30% to 90% relative humidity (no condensation)
Weight 9/16 lb. (0.25 kg) 7/32 lb. (0.10 kg)
Color Munsell 1.0Y9.2/0.2
4. Outside dimensions
LGH-F300RVX-E, LGH-F470RVX-E, LGH-F600RVX-E
N
J
JA
F
C
F
K L
B
E
D
M
13/16 (20)
M
φG φH
N
4 17/32 (115)
EA
(exhaust air outlet)
Air exhaust fan
OA
(outside air intake)
Core, air lter,High-
E󰀩ciency lter, fan,
maintenance space
More than 23 5/8 (600)
Position where duct
direction change is possible
Air lters
Lossnay core
Inspection
opening
1.5 x 1.5 ft (450 x
450) or more
Control box
Maintenance cover
Air supply fan
RA
(return air)
SA
(supply air)
By-pass damper plate
Position where duct direction change is possible
High-E󰀩ciency lter (sold separately) attachment position
Ceiling suspension xture
(4-9/16 X 13/16 (4-15 X 20) oval)
Power supply
cable opening
5 7/8 ~ 9 7/8 (150~250)
Model Dimensions
Ceiling suspension fixture pitch Nominal
diameter
Duct connecting flange Duct pitch
Weight
lbs (kg)
A B C D E F G H J K L M N
LGH-F300RVX-E
34 15/16
(888)
40
(1016)
13 1/32
(331)
34 1/2
(875)
41 7/8
(1063)
3 11/32
(85)
7 7/8
(200)
7 9/16
(192)
8 3/16
(208)
3 1/8
(79)
29 3/8
(745)
5 5/16
(135.5)
4 7/8
(124)
1 3/16
(30)
75
(34)
LGH-F470RVX-E
45 1/16
(1144)
39 1/2
(1004)
15 29/32
(404)
44 17/32
(1131)
41 3/8
(1051)
3 1/32
(77)
9 7/8
(250)
9 1/2
(242)
10 3/16
(258)
3 1/8
(79)
27 3/16
(690)
6 3/16
(157)
6 1/2
(165)
1 37/64
(40)
110
(50)
LGH-F600RVX-E
45 1/16
(1144)
48 1/2
(1231)
15 29/32
(404)
44 17/32
(1131)
50 5/16
(1278)
3 1/32
(77)
9 7/8
(250)
9 1/2
(242)
10 3/16
(258)
3 1/8
(79)
36 1/8
(917)
6 3/16
(157)
6 1/2
(165)
1 37/64
(40)
123
(56)
Unit: Inch (mm)

─ 6 ─
LGH-F1200RVX-E
Weight lbs (kg): 251 (114)
39 3/4 (1010)
36 1/8 (917)
36 1/8 (917)
50 1/8 (1272)
48 1/2 (1231)
45 1/16 (1144) 3 1/8 (79)1 3/4 (44)
27 9/16 (700)
1 37/64 (40)
1 37/64
(40)
1 37/64
(40)
10 5/8 (270)
10 5/8 (270)
5 7/8 ~ 9 7/8 (150 ~ 250)
More than 23 5/8 (600)
ø9 1/2
(ø242)
ø10 3/16
(ø258)
ø9 1/2
(ø242)
ø10 3/16
(ø258)
15 29/32
(404)
31 13/16 (808)
1 1/32 (26)
4 5/16 (110)
Ceiling suspension xture
(4-9/16 X 1 3/16 (4-15 X 30) oval)
SA
(supply air)
RA
(return air)
EA
(exhaust
air outlet)
OA
(outside air
intake)
Core, air lter,
High-E󰀩ciency
lter, fan,
maintenance
space
Lossnay cores
Air exhaust fan
By-pass damper plate
Air supply fan
Maintenance cover
Inspection
opening
1.5 x 1.5 ft (450 x
450) or more
Air lters
Power supply cable
opening
Control box
High-E󰀩ciency lter (sold separately) attachment position
Unit: Inch (mm)

─ 7 ─
PZ-61DR-E PZ-43SMF-E
422/32 (120)
3/4 (19)
423/32 (120)
23/4 (70)19/32 (15)
423/32 (120)
Unit: Inch (mm) Unit: Inch (mm)
PZ-50RF8-E, PZ-80RF8-E, PZ-100RF8-E
Model Dimension The number of
filters per set Applicable model
A B C Supply Exhaust
PZ-50RF8-E 18 1/2
(470)
7 13/64
(183)
19/32
(15) 2 2 LGH-F300RVX-E
PZ-80RF8-E 21 19/64
(451)
9 9/16
(243)
19/32
(15) 2 2 LGH-F470RVX-E
PZ-100RF8-E 22 1/4
(565)
9 9/16
(243)
19/32
(15)
2 2 LGH-F600RVX-E
4 4 LGH-F1200RVX-E
Notes:
• Each Lossnay unit is provided with one set of the filters. (Two sets for LGH-F1200RVX-E)
Unit: Inch (mm)

─ 8 ─
5. Electrical wiring diagrams
LGH-F300RVX-E, LGH-F470RVX-E, LGH-F600RVX-E
7
8
9
10
S
A
B
1
2
1
2
N
L
N
PE
L
M1
M2
GM CN7
CN118
CN119
CN10
CN9 TAB3, 4
REACTOR
TAB2 TAB1
ISOLATOR
TH1 (OA)
TH2 (RA)
LINE
FILTER
SUPPLY
FAN MOTOR
EXHAUST
FAN MOTOR
TM1
CN19
CN18
CN22
CN5
SA2SA1 SW5
SW2
3
POWER
SUPPLY
TM2
TB5
TM4
TM3
12 V or
24 V DC
Mr. Slim
(Non-polar)
M-NET
transmission cable
Shield Wire
2nd remote controller
(Max 2 controllers)
2nd Lossnay unit
(Max 15 units)
(*1) MAX 240 V AC 1 A MIN 208 V AC 100 mA
24 V DC 1 A 5 V DC 100 mA
Operation
monitor output (*1)
Bypass monitor or
Pre-heater signal output (*1)
PZ-
61DR-E
Malfunction
monitor output (*1)
CN26 (WH)
CN32 (WH)
CN17 (RE)
COM
(Field supply)
Volt-free
contact
Upper Printed
Circuit Board
(Control circuit board)
LED1
LED2
LED4
LED3
Lower Printed
Circuit Board
(Power circuit board)
LED6
X13
X14
X15
TAB5
CN20 (GR)
SW7
CN105 (RE)
208-230 V ～60 Hz
Definition of symbols
M1: Motor for exhaust fan X13: Relay contact CN20: Unused
M2: Motor for supply fan X14: Relay contact CN26: Connector (By-pass, 0-10 V DC Fan speed control)
GM: Motor for By-pass damper X15: Relay contact CN32: Connector (Remote control selection)
TH1: Thermistor for outside air CN5: Connector (Thermistor RA) CN105: Connector (IT communication)
TH2: Thermistor for return air CN7: Connector (Motor for By-pass damper) SA1: Address setting rotary switch (10 digit)
SW2,5,7: Switch (Function selection) CN9: Connector (Fan motor) SA2: Address setting rotary switch (1 digit)
TM1: Terminal block (Power supply) CN10: Connector (Fan motor) LED1 to LED3: Inspection indicator lamp
TM2: Terminal block (External control input) CN17: Connector (Fan speed 1/2/3/4) LED4, LED6: Power supply indicator lamp
TM3: Terminal block (Monitor output) CN18: Connector SYMBOL : Terminal block
TM4: Terminal block (Transmission cable) CN118: Connector : Connector on PCB
TB5: Terminal block (M-NET Transmission cable) CN19: Connector
TAB1, TAB2, (TAB5): Connector (Power supply) CN119: Connector
TAB3, TAB4: Connector (Reactor) CN22: Connector (Thermistor OA)
■ Attention
1. With this product, the wiring installation method will vary according to the design of the system.
2. Perform electrical installation to meet local electrical regulations.
3. Always use double insulated PVC cable for the transmission cables.
4. Wiring work must be performed by qualified professionals.
5. All supply circuits must be disconnected before obtaining access to the terminal devices.
6. Select proper circuit breaker according to the electrical current information in the chart below
Model LGH-F300RVX-E LGH-F470RVX-E LGH-F600RVX-E
Maximum current when operating [A] 2.05 3.10 3.45
Inrush current after pow-
er supply ON [A]
10 ms 6.1
100 ms 3.6

─ 9 ─
LGH-F1200RVX-E
12 V or
24 V DC
Mr. Slim
(Non-polar)
7
8
9
10
S
A
B
1
2
1
2
N
L
N
PE
L
M1
M2
CN7
CN118
CN119
CN10
CN9
TAB3,4
REACTOR
TAB5
TAB1
ISOLATOR
TH1 (OA)
TH2 (RA)
LINE
FILTER
SUPPLY
FAN MOTOR
EXHAUST
FAN MOTOR
TM1
CN19
CN18
CN22
CN5
SA2SA1
SW5
SW2
3
POWER
SUPPLY
TM2
TB5
TM4
TM3
M-NET
transmission cable
Shield Wire
2nd remote controller
(Max 2 controllers)
2nd Lossnay unit
(Max 15 units)
(*1) MAX 240 VA C 1 A MIN 208 V AC 100 mA
24 V DC 1 A 5 V DC 100 mA
PZ-
61DR-E
CN26 (WH)
CN32 (WH)
CN17(RE)
TAB2
M1
M2
CN7
CN10
CN9 TAB3, 4
REACTOR
TAB2
EXHAUST
FAN MOTOR
TAB1
CN121
CN21
Operation
monitor output (*1)
Malfunction
monitor output (*1)
COM
(Field supply)
SUPPLY
FAN MOTOR
Upper Printed
Circuit Board
LED1
LED2
LED4
LED3
X13
X14
X15
Volt-free
contact
GM
GM
Bypass monitor or
Pre-heater signal
output (*1)
Lower Printed
Circuit Board 2
LED6
Lower Printed
Circuit Board 1
LED6
CN20 (GR)
208-230 V ～ 60 Hz
SW7
CN105 (RE)
Upper Printed
Circuit Board
(Control circuit board)
(Power circuit board (upper))
(Power circuit board)
Definition of symbols
M1: Motor for exhaust fan X13: Relay contact CN20: Unused
M2: Motor for supply fan X14: Relay contact CN21: Connector
GM: Motor for By-pass damper X15: Relay contact CN121: Connector
TH1: Thermistor for outside air CN5: Connector (Thermistor RA) CN22: Connector (Thermistor OA)
TH2: Thermistor for return air CN7: Connector (Motor for By-pass damper) CN26: Connector (By-pass, 0-10 V DC Fan speed control)
SW2,5,7: Switch (Function selection) CN9: Connector (Fan motor) CN32: Connector (Remote control selection)
TM1: Terminal block (Power supply) CN10: Connector (Fan motor) CN105: Connector (IT communication)
TM2: Terminal block (External control input) CN17: Connector (Fan speed 1/2/3/4) SA1: Address setting rotary switch (10 digit)
TM3: Terminal block (Monitor output) CN18: Connector SA2: Address setting rotary switch (1 digit)
TM4: Terminal block (Transmission cable) CN118: Connector LED1 to LED3: Inspection indicator lamp
TB5: Terminal block (M-NET Transmission cable) CN19: Connector LED4, LED6: Power supply indicator lamp
TAB1, TAB2, (TAB5): Connector (Power supply) CN119: Connector SYMBOL : Terminal block
TAB3, TAB4: Connector (Reactor) : Connector on PCB
■ Attention
1. With this product, the wiring installation method will vary according to the design of the system.
2. Perform electrical installation to meet local electrical regulations.
3. Always use double insulated PVC cable for the transmission cables.
4. Wiring work must be performed by qualified professionals.
5. All supply circuits must be disconnected before obtaining access to the terminal devices.
6. Select proper circuit breaker according to the electrical current information in the chart below
Model LGH-F1200RVX-E
Maximum current when operating [A] 6.40
Inrush current after pow-
er supply ON [A]
10 ms 12.2
100 ms 7.2

─ 10 ─
1s digit10s digit
Fed with power: lit
Not fed with power: unlit
Remote controller
power supply indicator
(LED3 Green)
Bypass monitor output
Pre-heater output
(Between [7] and [10] )
During bypass mode or
when the pre-heater is operating: 0 Ω
During energy recovery mode or
when the pre-heater is stopped:
∞
Ω
Malfunction monitor output
(Between [8] and [10] )
Error: 0 Ω
Normal: ∞ Ω
Operation monitor output
(Between [9] and [10] )
When Lossnay is operating: 0 Ω
When Lossnay is stopped:
∞
Ω
Monitor output
COM
Remote controller
(PZ-61DR-E)
10 to 13 V DC
M-NET transmission
cable (Power supply
unit, etc.)
M-NET transmission
cable (Shielded)
External control input
Power circuit
board (upper)
5 V DC (Insulated)
Power for the circuit
Fed with power: lit
Not fed with power: unlit
Address setting
switch
Model selection
switch
Function selection
switch
Error indicator
(LED1 Green)
Normal: unlit
Error: blinking
During delay operation: lit
M-NET indicator
(LED2 Red)
Registered: unlit
Not registered: lit
M-NET communication error: blinking
Power supply indicator
for the circuit
(LED4 Red)
Outdoor air (OA)
thermistor
Return air (RA)
thermistor
Circuit board name Lot number indication
Indication of the
microcomputer
software No.
SA1 SA2 SW6
SW2
SW5
SW7
GND
(Insulated)
Power circuit board
12 to 14 V DC
(Insulated)
Only for LGH-F1200RVX-E
6. Circuit board diagrams
Circuit board diagrams and check points
(1)Control circuit board