Mitsubishi Electric LGH-F300RVX2-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-F300RVX2-E
LGH-F380RVX2-E
LGH-F470RVX2-E
LGH-F600RVX2-E
LGH-F940RVX2-E
LGH-F1200RVX2-E
February 2022 No. U307-A
Remote controller (Optional)
PZ-62DR-EA
PZ-43SMF-E
Filter (For replacement)
PZ-50RF9-E
PZ-65RF9-E
PZ-80RF9-E
PZ-100RF9-E
Nameplate
Nameplate

Contents
─ 2 ─
Contents
1. Safety precautions .......................................................................... 3
2. Changed points............................................................................... 4
3. Specifications.................................................................................. 4
4. Outside dimensions ........................................................................ 6
5. Electrical wiring diagrams ............................................................... 9
6. Circuit board diagrams...................................................................11
7. Troubleshooting ............................................................................ 13
7-1 Service flowchart ....................................................................................13
7-2 Check Details .........................................................................................14
8. Overhauling procedures................................................................ 40
9. Parts catalog ................................................................................. 54
LGH-F300RVX2-E ........................................................................................55
LGH-F380RVX2-E ........................................................................................63
LGH-F470RVX2-E ........................................................................................71
LGH-F600RVX2-E ........................................................................................79
LGH-F940RVX2-E ........................................................................................87
LGH-F1200RVX2-E ......................................................................................95
3
4
4-5
6-8
9-10
11-12
13-39
13-14
14-39
40-53
54-102
55-62
63-70
71-78
79-86
87-94
95-102

─ 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
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.)
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
Qualified electricians shall conduct electric work in
accordance with your local electric work regulations
and the installation manuals.
( 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 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-F300RVX2-E LGH-F300RVX-E • Filter grade was changed from MERV4 to MERV7.
• New control circuit board
LGH-F380RVX2-E –
LGH-F470RVX2-E LGH-F470RVX-E
LGH-F600RVX2-E LGH-F600RVX-E
LGH-F940RVX2-E –
LGH-F1200RVX2-E LGH-F1200RVX-E
PZ-62DR-EA PZ-61DR-E
3. Specifications
Model name LGH-F300RVX2-E, LGH-F380RVX2-E, LGH-F470RVX2-E, LGH-F600RVX2-E,
LGH-F940RVX2-E, LGH-F1200RVX2-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 (MERV7)
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 10 min OFF, 60 min ON
5°F (-15°C) or less: Sensing 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 ─
Model name
Input
power
(W)
Air volume
Specific
Fan
power
Static
pressure Exchange efficiency (%)
Noise
(dB)
Dia. of the
centrifugal
fan
(Inch (mm))
Weight
(CFM) (CMH)
(W/CFM) (InH2O) (Pa) Tempe-
rature
Enthalpy
(lbs) (kg)
Heating Cooling
LGH-F300RVX2-E 235 300 510 0.78 1.00 250 65.5 63.0 50.0 37.0 8 3/4 (220) 75 34
LGH-F380RVX2-E 340 380 646 0.89 0.86 215 65.0 61.0 49.0 38.0 9 5/8 (245) 90 41
LGH-F470RVX2-E 425 470 799 0.91 1.00 250 69.0 64.0 51.0 40.0 9 5/8 (245) 110 50
LGH-F600RVX2-E 515 600 1019 0.86 0.86 215 67.0 64.0 50.0 41.0 9 5/8 (245) 123 56
LGH-F940RVX2-E 850 940 1597 0.91 1.00 250 69.0 64.0 51.0 43.0 9 5/8 (245) 225 102
LGH-F1200RVX2-E 1030 1200 2039 0.86 0.86 215 67.0 64.0 50.0 43.0 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) immedi-
ately 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 ISO 16494:2014, therefore characteristic values are mea-
sured by chamber method.
* On-site commissioning measurements by pitot tube method could be as much 20% different from ISO test room
conditions. If the measuring point is close to sources of turbulence like bends, contractions and dampers, etc., it is
difficult to measure air volume correctly. A straight duct length more than 10 D (D=duct diameter) 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 procedures for buildings AG3/89.3
(2001)).
Remote controller
Model name PZ-62DR-EA PZ-43SMF-E
Power supply requirement 12 V DC (Supplied from Lossnay unit)
Power consumption 0.3 W
Transmission cable Non polarized 2-core cable (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)
Size 4 22/32 x 4 22/32 x 3/4 inch
(120 x 120 x 19 mm)
4 22/32 x 2 3/4 x 19/32 inch
(120 x 70 x 15 mm)
Weight 9/16 lbs (0.25 kg) 7/32 lbs (0.10 kg)

─ 6 ─
4. Outside dimensions
LGH-F300RVX2-E, LGH-F380RVX2-E, LGH-F470RVX2-E, LGH-F600RVX2-E
N
3 1/8 (79)3 1/8 (79) A
F
C
F
J K
B
E
D
L
13/16 (20)
L
φG φH
M
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
(4-1/2 X 13/16 (4-13 X 20) oval)
Power supply
cable opening
5 7/8 to 9 7/8 (150 to 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
LGH-F300RVX2-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)
29 3/8
(745)
5 5/16
(135.5)
4 7/8
(124)
1 3/16
(30)
75
(34)
LGH-F380RVX2-E
35 3/4
(908)
37 9/16
(954)
15 29/32
(404)
35 15/64
(895)
39 13/32
(1001)
2 3/4
(70)
7 7/8
(200)
7 9/16
(192)
8 3/16
(208)
27 1/4
(692)
5 5/32
(131)
4 7/8
(124) 090 (41)
LGH-F470RVX2-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)
27 3/16
(690)
6 3/16
(157)
6 1/2
(165)
1 37/64
(40)
110
(50)
LGH-F600RVX2-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)
36 1/8
(917)
6 3/16
(157)
6 1/2
(165)
1 37/64
(40)
123
(56)
Unit: Inch (mm)

─ 7 ─
LGH-F940RVX2-E, LGH-F1200RVX2-E
39 3/4 (1010)
C
B
D
A
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 to 9 7/8 (150 to 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 17/32 (115)
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
Model A B C D Weight
lbs (kg)
LGH-F940RVX2-E 39 1/2
(1004)
27 3/16
(690)
27 3/16
(690)
41 9/64
(1045)
225
(102)
LGH-F1200RVX2-E 48 1/2
(1231)
36 1/8
(917)
36 1/8
(917)
50 1/8
(1272)
251
(114)
Unit: Inch (mm)

─ 8 ─
PZ-62DR-EA 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-50RF9-E, PZ-65RF9-E, PZ-80RF9-E, PZ-100RF9-E
Model Dimension The number of
filters per set Applicable model
A B C Supply Exhaust
PZ-50RF9-E 18 1/2
(470)
7 13/64
(183)
25/32
(20) 2 2 LGH-F300RVX2-E
PZ-65RF9-E 17 3/64
(433)
8 37/64
(218)
25/32
(20) 2 2 LGH-F380RVX2-E
PZ-80RF9-E 17 3/4
(451)
9 9/16
(243)
25/32
(20)
2 2 LGH-F470RVX2-E
4 4 LGH-F940RVX2-E
PZ-100RF9-E 22 1/4
(565)
9 9/16
(243)
25/32
(20)
2 2 LGH-F600RVX2-E
4 4 LGH-F1200RVX2-E
Notes:
• Each Lossnay unit is provided with one set of the filters. (Two sets for LGH-F940RVX2-E
and LGH-F1200RVX2-E)
Unit: Inch (mm)

─ 9 ─
5. Electrical wiring diagrams
LGH-F300RVX2-E, LGH-F380RVX2-E, LGH-F470RVX2-E, LGH-F600RVX2-E
* Wiring for TM1, TM2, TM3, TM4, and TB5 shown in dotted lines are field work.
* Be sure to connect the earth wire.
* An all pole electric leakage isolator must be installed.
* Always use an isolator for the main power connection.
9
10
S
A
B
1
2
1
2
NL
NL
CN12
CN119
CN114
CN10
CN9
LED6
TAB1 TAB2
TM1
Power supply terminal
SW5
SW6
SW2
TM2
TB5
TM4
TM3
PZ-62DR-EA
LED3
LED2
LED1
Y
Z
Supply fan motor
Exhaust fan motor
Monitor output
12 V or 24 V DC
Mr. Slim (non-polar)
Volt-free contact
M-NET transmission cable
2nd remote controller
(Max. 2 controllers)
2nd Lossnay unit
(Max. 15 units)
Isolator (Field supply)
POWER SUPPLY
208–230 V/60 Hz
LINE FILTER
Shielded Wire
X11
Power circuit boardControl circuit board
CN113
REACTOR
M
1
M
2
GM
LED4
CN19
CN14
CN35 CN5 CN7CN34
SW12 SW11
LINE FILTER
Lossnay unit
LED5
CN23
LINE FILTER
(For LGH-F300RVX2-E,
LGH-F380RVX2-E)
TH1
(OA)
TH2
(RA)
CN32
CN105
CN50 CN26 CN17
Definition of symbols
M1: Motor for exhaust fan
M2: Motor for supply fan
GM: Motor for Bypass damper
TH1: Thermistor for outdoor air
TH2: Thermistor for return air
SW2, 5: Switch (Function selection)
SW6: Switch (Model selection)
TM1: Terminal block (Power supply)
TM2: Terminal block (External control input)
TM3: Terminal block (Monitor output)
TM4:
Terminal block (Remote controller transmission cable)
TB5: Terminal block (M-NET transmission cable)
TAB1, TAB2: Connector (Power supply)
X11: Relay contact
CN5: Connector (Thermistor RA)
CN7: Connector (Thermistor OA)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN12: Connector (Damper motor)
CN17: Connector (Fan speed 1/2/3/4)
CN14: Connector
CN113: Connector
CN114: Connector
CN19: Connector
CN119: Connector
CN23: Connector (CO2sensor power supply)
CN26: Connector (Bypass switching/CO2sensor input)
CN32: Connector (Remote control selection)
CN34: Connector (CO2sensor output)
CN35: Connector (CO2sensor input)
CN50: Connector (Optional components: External
monitor output)
CN105: Connector (For IT communication)
SW11: Address setting rotary switch (ones digit)
SW12: Address setting rotary switch (tens digit)
LED1: Inspection indicator lamp
LED2: M-NET indicator lamp
LED3:
Remote controller power supply indicator lamp
LED4, LED6: Power supply indicator lamp
LED5: CO2sensor power supply indicator lamp
(When the CO2sensor is connected)
SYMBOL : Terminal block, : Connector on PCB
Select proper isolator according to the electrical current information in the chart below.
Model LGH-F300RVX2-E LGH-F380RVX2-E LGH-F470RVX2-E LGH-F600RVX2-E
Maximum current when operating [A] 3.40 3.10 4.05 4.15
Inrush current after power
supply ON [A]
10 ms 6.1
100 ms 3.6

─ 10 ─
LGH-F940RVX2-E, LGH-F1200RVX2-E
* Wiring for TM1, TM2, TM3, TM4, and TB5 shown in dotted lines are field work.
* Be sure to connect the earth wire.
* An all pole electric leakage isolator must be installed.
* Always use an isolator for the main power connection.
9
10
S
A
B
1
2
1
2
NL
NL
TM1
Power supply terminal
SW5
SW6
SW2
TM2
TB5
TM4
TM3
PZ-62DR-EA
LED3
LED2
LED1
Y
Z
Monitor output
12 V or 24 V DC
Mr. Slim (non-polar)
Volt-free contact
M-NET transmission cable
2nd remote controller
(Max. 2 controllers)
2nd Lossnay unit
(Max. 15 units)
Isolator (Field supply)
POWER SUPPLY
208–230 V/60 Hz
LINE FILTER
Shielded Wire
X11
Control circuit board
LED4
CN21
CN14
CN13
CN35 CN5 CN7CN34
SW12 SW11
LINE FILTER
Lossnay unit
LED5
CN23
CN12
CN119
CN114
CN10
CN9
LED6
TAB1 TAB2
Supply fan
motor
Exhaust fan
motor
Supply fan
motor
Exhaust fan
motor
Power circuit board
(Lower unit)
CN113
REACTOR
M
1
M2
GM
CN19
CN12
CN121
CN10
CN9
LED6
TAB1 TAB2
Power circuit board
(Upper unit)
CN113
REACTOR
M
1
M2
GM
TH1
(OA)
TH2
(RA)
CN32
CN105
CN50 CN26 CN17
Definition of symbols
M1: Motor for exhaust fan
M2: Motor for supply fan
GM: Motor for Bypass damper
TH1: Thermistor for outdoor air
TH2: Thermistor for return air
SW2, 5: Switch (Function selection)
SW6: Switch (Model selection)
TM1: Terminal block (Power supply)
TM2: Terminal block (External control input)
TM3: Terminal block (Monitor output)
TM4:
Terminal block (Remote controller transmission cable)
TB5: Terminal block (M-NET transmission cable)
TAB1, TAB2: Connector (Power supply)
X11: Relay contact
CN5: Connector (Thermistor RA)
CN7: Connector (Thermistor OA)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN12: Connector (Damper motor)
CN17: Connector (Fan speed 1/2/3/4)
CN13: Connector
CN14: Connector
CN113: Connector
CN114: Connector
CN19: Connector
CN119: Connector
CN21: Connector
CN121: Connector
CN23: Connector (CO2sensor power supply)
CN26: Connector (Bypass switching/CO2sensor input)
CN32: Connector (Remote control selection)
CN34: Connector (CO2sensor output)
CN35: Connector (CO2sensor input)
CN50: Connector (Optional components: External
monitor output)
CN105: Connector (For IT communication)
SW11: Address setting rotary switch (ones digit)
SW12: Address setting rotary switch (tens digit)
LED1: Inspection indicator lamp
LED2: M-NET indicator lamp
LED3:
Remote controller power supply indicator lamp
LED4, LED6: Power supply indicator lamp
LED5: CO2sensor power supply indicator lamp
(When the CO2sensor is connected)
SYMBOL : Terminal block, : Connector on PCB
Select proper isolator according to the electrical current information in the chart below.
Model LGH-F940RVX2-E LGH-F1200RVX2-E
Maximum current when operating [A] 8.10 8.30
Inrush current after power
supply ON [A]
10 ms 12.2
100 ms 7.2