Mitsubishi Electric VL-250CZPVU-L-ERT User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
HANDBOOK
MODELS
VL-250CZPVU-L-E
VL-250CZPVU-R-E
VL-350CZPVU-L-E
VL-350CZPVU-R-E
VL-500CZPVU-L-E
VL-500CZPVU-R-E
VL-250CZPVU-L-ERT
VL-250CZPVU-R-ERT
VL-350CZPVU-L-ERT
VL-350CZPVU-R-ERT
VL-500CZPVU-L-ERT
VL-500CZPVU-R-ERT
July 2021 No. U295-C
Filter (Optional)
P-250F-E P-350F-E P-500F-E
P-250SF-E P-350SF-E P-500SF-E
P-250MF-E P-350MF-E P-500MF-E
P-250PF-E P-350PF-E P-500PF-E
P-250PFH-E P-350PFH-E P-500PFH-E
P-250NF-E P-350NF-E P-500NF-E
RC cover (Optional)
P-RCC-E
Silencer box (Optional)
P-250SB-E
P-350SB-E
P-500SB-E
LOSSNAY HEAT RECOVERY VENTILATOR
Nameplate
* The figure shows VL-350CZPVU-R-E.

Contents
─ 2 ─
Contents
1. Safety precautions .......................................................................... 3
2. Changed points............................................................................... 4
3. Names and functions of components.............................................. 4
4. Specifications.................................................................................. 6
5. Outside dimensions ........................................................................ 9
6. Electrical wiring diagrams ............................................................. 17
7. Circuit board diagrams.................................................................. 18
8. Principles of operation .................................................................. 21
9. Troubleshooting ............................................................................ 27
10. Service inspection list ................................................................. 48
11. Overhauling procedures.............................................................. 49
11-1 VL-250CZPVU-L type, VL-250CZPVU-R type......................................50
11-2 VL-350CZPVU-L type, VL-350CZPVU-R type......................................69
11-3 VL-500CZPVU-L type, VL-500CZPVU-R type......................................85
12. Parts catalog ............................................................................... 94
VL-250CZPVU-L-E .......................................................................................95
VL-250CZPVU-R-E.....................................................................................101
VL-350CZPVU-L-E .....................................................................................107
VL-350CZPVU-R-E.....................................................................................113
VL-500CZPVU-L-E .....................................................................................119
VL-500CZPVU-R-E.....................................................................................125
VL-250CZPVU-L-ERT ................................................................................131
VL-250CZPVU-R-ERT................................................................................137
VL-350CZPVU-L-ERT ................................................................................143
VL-350CZPVU-R-ERT................................................................................149
VL-500CZPVU-L-ERT ................................................................................155
VL-500CZPVU-R-ERT................................................................................161
3
4
4-5
6-8
9-16
17
18-20
21-26
27-47
48
49-93
50-68
69-84
85-93
94-166
95-100
101-106
107-112
113-118
119-124
125-130
131-136
137-142
143-148
149-154
155-160
161-166

─ 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 ─
3. Names and functions of components
- For L-type (for example, VL-350CZPVU-L-E),
filters, controller, and name plate are on the
reflected positions.
* The figure shows VL-350CZPVU-R-E.
18
2
9
310
511
6
7
Optional filter
Filter name MODEL Applicable model Location to use Main material Replacement intervals
Replacement filter
P-250F-E VL-250CZPVU series
RA, OA
L-Type
R-Type
RA: Return Air
OA: Outdoor Air
SA: Supply Air
PET,
acrylic fiber Three yearsP-350F-E VL-350CZPVU series
P-500F-E VL-500CZPVU series
Standard filter
P-250SF-E VL-250CZPVU series
RA, OA, SA
Polypropylene,
polyester
One yearP-350SF-E VL-350CZPVU series
P-500SF-E VL-500CZPVU series
Medium efficiency
filter
P-250MF-E VL-250CZPVU series
RA, OA, SA One yearP-350MF-E VL-350CZPVU series
P-500MF-E VL-500CZPVU series
PM2.5 filter
P-250PF-E VL-250CZPVU series
RA, OA, SA
For SA installation:
One year
For OA and RA installations:
Six months
P-350PF-E VL-350CZPVU series
P-500PF-E VL-500CZPVU series
PM1 filter
P-250PFH-E VL-250CZPVU series
RA, OA, SA P-350PFH-E VL-350CZPVU series
P-500PFH-E VL-500CZPVU series
NOx filter
P-250NF-E VL-250CZPVU series
SA Pulp Six monthsP-350NF-E VL-350CZPVU series
P-500NF-E VL-500CZPVU series
* When a NOx filter and an optional dust catch filter (P-250/350/500SF-E, P-250/350/500MF-E, P-250/350/500PF-E,
P-250/350/500PFH-E) are used together, be sure to install a NOx filter on the SA side and a dust catch filter on the OA side.
* Install any of the filters other than NOx filter on the OA and RA side to protect the product.
4
OA
SA
RA
RA
SA
OA
2. Changed points
New model Previous model Changes from the previous model
VL-250CZPVU-L-ERT VL-250CZPVU-L-E
To meet certification requirements of the destination countries,
Instruction Manual and Installation Manual are provided in the
local languages: Russian, Kazakh, Armenian, and Ukrainian.
The structure and characteristic values of the product are not
changed.
VL-250CZPVU-R-ERT VL-250CZPVU-R-E
VL-350CZPVU-L-ERT VL-350CZPVU-L-E
VL-350CZPVU-R-ERT VL-350CZPVU-R-E
VL-500CZPVU-L-ERT VL-500CZPVU-L-E
VL-500CZPVU-R-ERT VL-500CZPVU-R-E
No. Name Function
1Exhaust air
filter
It prevents the heat exchanger
from clogging.
2Exhaust air
filter case It holds the exhaust air filter.
3Optional air
filter case
For the optional filter
(See the table below.)
4 Filter cover -
5Drain pipe
attachment It is connected to the drain pipe.
6 Control box It holds the circuit board.
7 Name plate
It shows product name and serial No.
8Outdoor air
filter
It removes insects, pollen, dirt, dust,
and other particles from the outdoor
air that is taken into the room.
9Outdoor air
filter case It holds the outdoor air filter.
10
Heat exchanger
(Lossnay core)
It exchanges heat between the
supply air and the return air.
11 Controller
Product operation
* The controller can be installed externally.
(Use the optional component P-RCC-E for
external installation)

─ 5 ─
Installation example
Notes
- Make sure that the exhaust air connection has two or more confluence points with the piping from the
bathroom.
- Pre-heaters and electric dampers may be required in your region.
- Read the instructions carefully in advance when using optional components and commercially available
components.
EA
SA
RA
OA
Pre-heater
(Field supply)
OA shutter
(Field supply)
Externally-installed controller
(Use P-RCC-E for installation)
Silencer Box
(P-250SB-E, P-350SB-E, P-500SB-E)
Router
(Field supply)
By-pass switch
(Field supply)
Living room
Rest room
Humidity sensor
(Field supply)
Ventilation fan
interlocking lighting
switch (Field supply)
Isolator
(Field supply)
CO2sensor
(Field supply)
Wi-Fi interface
(Use MAC-567IF-E)
Outdoor
Tablets
(Field supply)

─ 6 ─
4. Specifications
Model VL-250CZPVU-L-E, VL-250CZPVU-R-E
VL-250CZPVU-L-ERT, VL-250CZPVU-R-ERT
Heat exchange system Heat recovery ventilating system
Heat exchanger material Sensible heat exchanger
Cladding Steel sheet
Heat insulation material Polyethylene foam
Motor DC motor
Blower 180 mm diameter centrifugal fan
Filter Non-woven fabrics filter
Duct connecting Synthetic resin
Duct connecting cover Styrene foam
Outside air condition Shall be higher than -15°C
Return (Suction) air
condition Shall be lower than 40°C, 95%RH
Surrounding air condition Indoor temperature and humidity should not exceed the dew point temperature 12°C
(e.g. RH 60%, 20°C)
Supply fan operation under
low outdoor temperature
-3°C to -15°C: Intermittent operation
-15°C or less: Supply air fan stopped.
*Exhaust air fan:
continuous operation
Function Heat exchange ventilation/ By-pass ventilation, Fan speed 1,2,3,4
The air flow increment by 1% from 25% to 100%
Dimensions
(Height x Width x Depth) 565 mm x 595 mm x 356 mm
Weight 26 kg
Electrical power supply 220–240 V 50 Hz/ 220 V 60 Hz
Insulation resistance 10 MΩ or more
Dielectric strength 1000 V AC 1 minute
Maximum current [A] 1.00
Specifications
Ventilation mode Heat exchange mode
Fan speed Fan Speed 4 (100%) Fan Speed 3 (70%) Fan Speed 2 (50%) Fan Speed 1 (30%)
Running current [A] 0.76 0.35 0.20 0.12
Input power [W] 106 44 23 11
Air volume [m3/h] 250 175 125 75
[L/s] 69 49 35 21
External static
pressure [Pa] 150 74 38 14
Temperature
exchange efficiency
[%] 85 87 88 90
Sound pressure
level at 3 m [dB] 31 22 16 15 >
Attention
1. The above values are at factory default.
2. The running current, the input power, the efficiency and the noise are based on the rating air volume, and 230 V
50 Hz.
3. The sound pressure level at 3 m is spherical.
4. Temperature exchange efficiency (%) is based on winter conditions.
5. Mitsubishi Electric measures figures in the chart according to EN13141-7:2010, and the characteristic curves are
measured by chamber method.

─ 7 ─
Model VL-350CZPVU-L-E, VL-350CZPVU-R-E
VL-350CZPVU-L-ERT, VL-350CZPVU-R-ERT
Heat exchange system Heat recovery ventilating system
Heat exchanger material Sensible heat exchanger
Cladding Steel sheet
Heat insulation material Polyethylene foam
Motor DC motor
Blower 210 mm diameter centrifugal fan
Filter Non-woven fabrics filter
Duct connecting Synthetic resin
Duct connecting cover Styrene foam
Outside air condition Shall be higher than -15°C
Return (Suction) air
condition Shall be lower than 40°C, 95%RH
Surrounding air condition Indoor temperature and humidity should not exceed the dew point temperature 12°C
(e.g. RH 60%, 20°C)
Supply fan operation under
low outdoor temperature
-3°C to -15°C: Intermittent operation
-15°C or less: Supply air fan stopped.
*Exhaust air fan:
continuous operation
Function Heat exchange ventilation/ By-pass ventilation, Fan speed 1,2,3,4
The air flow increment by 1% from 25% to 100%
Dimensions
(Height x Width x Depth) 623 mm x 658 mm x 432 mm
Weight 32 kg
Electrical power supply 220–240 V 50 Hz/ 220 V 60 Hz
Insulation resistance 10 MΩ or more
Dielectric strength 1000 V AC 1 minute
Maximum current [A] 1.32
Specifications
Ventilation mode Heat exchange mode
Fan speed Fan Speed 4 (100%) Fan Speed 3 (70%) Fan Speed 2 (50%) Fan Speed 1 (30%)
Running current [A] 1.08 0.52 0.31 0.18
Input power [W] 155 71 37 19
Air volume [m3/h] 320 224 160 96
[L/s] 89 62 44 27
External static
pressure [Pa] 150 74 38 14
Temperature
exchange efficiency
[%] 85 87 88 90
Sound pressure
level at 3 m [dB] 35 26 19 15 >
Attention
1. The above values are at factory default.
2. The running current, the input power, the efficiency and the noise are based on the rating air volume, and 230 V
50 Hz.
3. The sound pressure level at 3 m is spherical.
4. Temperature exchange efficiency (%) is based on winter conditions.
5. Mitsubishi Electric measures figures in the chart according to EN13141-7:2010, and the characteristic curves are
measured by chamber method.

─ 8 ─
Model VL-500CZPVU-L-E, VL-500CZPVU-R-E
VL-500CZPVU-L-ERT, VL-500CZPVU-R-ERT
Heat exchange system Heat recovery ventilating system
Heat exchanger material Sensible heat exchanger
Cladding Steel sheet
Heat insulation material Polyethylene foam
Motor DC motor
Blower 230 mm diameter centrifugal fan
Filter Non-woven fabrics filter
Duct connecting Synthetic resin
Duct connecting cover Styrene foam
Outside air condition Shall be higher than -15°C
Return (Suction) air
condition Shall be lower than 40°C, 95%RH
Surrounding air condition Indoor temperature and humidity should not exceed the dew point temperature 12°C
(e.g. RH 60%, 20°C)
Supply fan operation under
low outdoor temperature
-3°C to -15°C: Intermittent operation
-15°C or less: Supply air fan stopped.
*Exhaust air fan:
continuous operation
Function Heat exchange ventilation/ By-pass ventilation, Fan speed 1,2,3,4
The air flow increment by 1% from 25% to 100%
Dimensions
(Height x Width x Depth) 632 mm x 725 mm x 556 mm
Weight 39 kg
Electrical power supply 220–240 V 50 Hz/ 220 V 60 Hz
Insulation resistance 10 MΩ or more
Dielectric strength 1000 V AC 1 minute
Maximum current [A] 2.3
Specifications
Ventilation mode Heat exchange mode
Fan speed Fan Speed 4 (100%) Fan Speed 3 (70%) Fan Speed 2 (50%) Fan Speed 1 (30%)
Running current [A] 1.73 0.77 0.40 0.19
Input power [W] 275 104 49 21
Air volume [m3/h] 500 350 250 150
[L/s] 139 97 69 42
External static
pressure [Pa] 200 98 50 18
Temperature
exchange efficiency
[%] 85 87 89 92
Sound pressure
level at 3 m [dB] 37 29 22 15 >
Attention
1. The above values are at factory default.
2. The running current, the input power, the efficiency and the noise are based on the rating air volume, and 230 V
50 Hz.
3. The sound pressure level at 3 m is spherical.
4. Temperature exchange efficiency (%) is based on winter conditions.
5. Mitsubishi Electric measures figures in the chart according to EN13141-7:2010, and the characteristic curves are
measured by chamber method.

─ 9 ─
5. Outside dimensions
VL-250CZPVU-L-E, VL-250CZPVU-L-ERT
202202
2088181
φ 122
51
(565)
14
242
119
595
32
219224
280
309
126
83
10 356 20
40
40
30179179179
681
228423
178387
Drain pipe (EA)
φ22 Drain pipe (SA)
φ22
Power supply cord Control box
Pipe guide (EA)
Pipe guide (OA)
Pipe guide (SA)
Pipe guide (RA)
Filter cover (OA)
Filter cover (RA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Wall mount hook center
Cable strap hole
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
150
300
298
125
500
46
600
Control box
Space to pull out the control box
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 10 ─
VL-250CZPVU-R-E, VL-250CZPVU-R-ERT
202202
88
181
32
595
φ122
224219
86
318
269
115
10 356 20
40
40
30179179179
20
242
51
(565)
14
118
228423
178387
681
Drain pipe (EA)
φ22
Drain pipe (SA)
φ22
Power supply cord Control box
Pipe guide (SA)
Pipe guide (RA)
Pipe guide (EA)
Pipe guide (OA)
Filter cover (RA)
Filter cover (OA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Wall mount hook center
Cable strap hole
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
300
150
500
298
600
60
125
Control box
Space to pull out the control box
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 11 ─
VL-350CZPVU-L-E, VL-350CZPVU-L-ERT
20
192 222
20
222 192
209 112
31
84
(623)
15
242
658
242 242
350
377
149
106
10 432
200 200 200
40
40
30
φ 145
103
246460
195428
736
Drain pipe (EA)
φ22 Drain pipe (SA)
φ22
Power supply cord
Control box
Pipe guide (EA)
Pipe guide (OA)
Pipe guide (SA)
Pipe guide (RA)
Filter cover (OA)
Filter cover (RA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Cable strap hole
Wall mount hook center
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
678
580
150
125
298
300
46
1010
Control box
Space to pull out the control box
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 12 ─
VL-350CZPVU-R-E, VL-350CZPVU-R-ERT
658
(623) 84
31
95
322
372
121
111209
200200200
192 222
222 192
15
30
10 20
242242
40
40
242
φ 145
20
432
102
736
246460
195428
Drain pipe (EA)
φ22
Drain pipe (SA)
φ22
Power supply cord Control box
Pipe guide (SA)
Pipe guide (RA)
Pipe guide (EA)
Pipe guide (OA)
Filter cover (RA)
Filter cover (OA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Wall mount hook center
Cable strap hole
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
300
150
580
60
678
298
125
1010
Control box
Space to pull out the control box
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 13 ─
VL-500CZPVU-L-E, VL-500CZPVU-L-ERT
254250
254 250
20134289
φ 183
φ 157
49
(632)
14
242
120
725
32
748
235
51
235
424
453
265
219
10 556 20 40
40
29
223223223
236482
185447
Drain pipe (EA)
φ22
Drain pipe (SA)
φ22
Power supply cord
Control box
Pipe guide (EA)
Pipe guide (OA)
Pipe guide (SA)
Pipe guide (RA)
Filter cover (OA)
Filter cover (RA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Cable strap hole
Wall mount hook center
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
Control box
Space to pull out the control box
150
300
745
125
700
298
1010
46
125
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 14 ─
VL-500CZPVU-R-E, VL-500CZPVU-R-ERT
254250
254 250
20134289
φ 183
φ 157
49
(632)
14
242
120
725
32
748
235
51
235
332
144
381
378
173
10 556 20 40
40
29
223223223
236482
185447
Drain pipe (EA)
φ22
Drain pipe (SA)
φ22
Power supply cord
Control box
Pipe guide (SA)
Pipe guide (RA)
Pipe guide (EA)
Pipe guide (OA)
Filter cover (RA)
Filter cover (OA)
Filter cover (SA)
Wall mount hook top
Controller
Heat exchanger
Wall mount hook down
Wall bracket
(accessory)
Wall mount hook center
Cable strap hole
RA: Return Air
SA: Supply Air
EA: Exhaust Air
OA: Outdoor Air
150
300
125
298
745
125
700
60
10 10
Space to pull out the control box Control box
Working space (Required space around the Lossnay unit)
Unit (mm)

─ 15 ─
P-RCC-E
■
■
Unit (mm)
P-250F-E, P-250SF-E, P-250MF-E, P-250PF-E, P-250PFH-E, P-250NF-E, P-350F-E, P-350SF-E, P-350MF-E
P-350PF-E, P-350PFH-E, P-350NF-E, P-500F-E, P-500SF-E, P-500MF-E, P-500PF-E, P-500PFH-E, P-500NF-E
A
B
15
MODEL A B
P-250F-E 302 178
P-250SF-E, P-250MF-E, P-250PF-E
P-250PFH-E, P-250NF-E 306 177
P-350F-E 377 178
P-350SF-E, P-350MF-E, P-350PF-E
P-350PFH-E, P-350NF-E 382 177
P-500F-E 502 178
P-500SF-E, P-500MF-E, P-500PF-E
P-500PFH-E, P-500NF-E 506 177
Unit (mm)

─ 16 ─
P-250SB-E P-350SB-E
593
434 54
φ122
21
355
558
179 179 179
234226
502
15201
15 201
109
288
109
290
200
Wall mount hook top Wall bracket
(accessory)
Under fix piece
Wall mount hook center
Pipe guide (OA/RA)
Pipe guide (SA/EA)
Pipe guide (SA/EA)
Pipe guide (OA/RA)
650
51191
51 191
132
336
130
340
φ145
63465
655
21 430
200 200 200
590
254268
200
565
Wall mount hook top Wall bracket
(accessory)
Under fix piece
Wall mount hook center
Pipe guide (OA/RA)
Pipe guide (SA/EA)
Pipe guide (SA/EA)
Pipe guide (OA/RA)
Unit (mm) Unit (mm)
P-500SB-E
250
437
160
567 52
154
443
250
723 554 21
27
27
φ183
φ157
210 270 210
223
200
223 223
282 309
633
Wall mount hook top Wall bracket
(accessory)
Under fix piece
Wall mount hook center
Pipe guide
(OA/RA)
Pipe guide (SA/EA)
Pipe guide (SA/EA)
Pipe guide (OA/RA)
Unit (mm)

─ 17 ─
6. Electrical wiring diagrams
VL-250CZPVU-L-E, VL-250CZPVU-R-E, VL-350CZPVU-L-E, VL-350CZPVU-R-E, VL-500CZPVU-L-E
VL-500CZPVU-R-E, VL-250CZPVU-L-ERT, VL-250CZPVU-R-ERT, VL-350CZPVU-L-ERT, VL-350CZPVU-R-ERT
VL-500CZPVU-L-ERT, VL-500CZPVU-R-ERT
VL-40P
VL-40S
Wiring example
VL-40P
Pre-heater
12 V or 24 V DC
(0-10 V DC)
24 V DC
By-pass
POWER SUPPLY
220-240 V 50 Hz
220 V 60 Hz
Can be removed from the main unit.
POWER SUPPLY
220-240 V 50 Hz
220 V 60 Hz
15 V DC 0.1 A
By-pass
Definition of symbols
M1 Motor for exhaust fan CN18, CN19, CN118, CN119 Connector
M2 Motor for supply fan CN130, CN131, CN132, CN232 Connector
GM Motor for By-pass damper CN217, CN26, CN32 Connector
TH1 Thermistor for outside air CN22 Connector (Thermistor OA)
TH2 Thermistor for return air CN5 Connector (Thermistor RA)
TM2 Terminal block (External control input) CN7 Connector (Motor for By-pass damper)
TM4 Terminal block (Remote controller)
TM3 Terminal block (Monitor output) LED1 to LED4 Inspection indicator lamp
TM200 Terminal block (0-10 V DC) LED6 Power supply indicator lamp
TM201 Terminal block (Volt-free) SA1 Not in use
TAB1, TAB2 Connector (Power supply) SA2 Not in use
TAB3, 4 Connector (Reactor) SW2 Function selection Switch
TAB5 Not in use (or Not equipped) SW5, SW7 Not in use (or Not equipped)
CN9, CN10 Connector (Fan motor) SW6 Model selection switch
CN17 to CN20 Connector
CN105 Connector (IT) SYMBOL Terminal block
Connector on PCB
■ Attention
1. Electrical work must be carried out safely and reliably by a professional electrical contractor (properly qualified electrician) in accordance with
internal wiring provisions and electrical-equipment technical standards.
2. Use 220 to 240 V AC Power.
3. Use the designated electric wires, and connect them securely so that they do not come loose.
4. Be sure to install the ground wire.
5. Install an all-pole power supply isolator at the power supply side as per local electrical regulations. All supply circuits must be disconnected before
obtaining access to the terminal devices. Use the specified size cable and connect the cables securely to prevent disconnection when they are pulled.

─ 18 ─
7. Circuit board diagrams
Circuit board diagrams and check points
(1) Control circuit board
Signal interface
circuit board
During error status or
when the OA shutter is open: 0 Ω
During normal operation or
when the OA shutter is closed:
∞
Ω
When Lossnay is operating or
when After-heater is operating: 0 Ω
When Lossnay is stopped or
when After-heater is stopped:
∞
Ω
1s digit10s digit
Fed with power: lit
Not fed with power: unlit
Remote controller
power supply indicator
(LED3 Green)
By-pass monitor output
Pre-heater output
(Between [7] and [10] )
During by-pass mode or
when the pre-heater is operating: 0 Ω
During heat exchange mode or
when the pre-heater is stopped:
∞
Ω
Malfunction monitor output
OA shutter output
(Between [8] and [10] )
Operation monitor output
After-heater output
(Between [9] and [10] )
Monitor output
COM
Controller
10 to 13 V DC
External control input
5 V DC (Insulated)
Power for the circuit
Fed with power: lit
Not fed with power: unlit
Not in use Model selection
switch
Function selection
switch
Not in use
(or Not equipped)
Error indicator
(LED1 Green)
Normal: unlit
Error: blinking
During delay operation: lit
LED2
Red
Lit all the time
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)

─ 19 ─
(2) Power circuit board
GND
(Not insulated)
12 to 14 V DC
(Insulated)
GND
(Insulated)
14 to 16 V DC
(Not insulated) Reactor
Supply fan motor (CN10)
Pin No. of the connector
[1] Power for the motor: 280 to 360 V DC
[2] Not used
[3] GND
[4] Power for motor control: 14 to 16 V DC
[5] Speed command voltage: 0 to 6 V DC
[6] Rotational speed pulse
Exhaust fan motor (CN9)
Pin No. of the connector
[1] Power for the motor: 280 to 360 V DC
[2] Not used
[3] Not used
[4] GND
[5] Power for motor control: 14 to 16 V DC
[6] Speed command voltage: 0 to 6 V DC
[7] Rotational speed pulse
Fed with power: lit
Not fed with power: unlit
Power supply indicator
for motor control
(LED6 Red)
Control circuit
board
Damper motor output
220 to 240 V, 50 Hz
220 V, 60 Hz
Power interface
circuit board
Fuse
10 A, 250 V
Fuse
5 A, 250 V
Lot number
indication
Circuit board
name
Caution:
The power circuit board is not insulated from the power line (high voltage part), except for the connection part
(CN118 and CN119) with the control circuit board. Also, even when the power supply is cut off, the capacitor is
charged. Therefore, wait for at least five minutes before starting work.

─ 20 ─
(3) Power interface circuit board
(4) Signal interface circuit board
Lot number indicationCircuit board name
Power supply input,
Live switch input
220 to 240 V, 50 Hz
220 V, 60 Hz
Power circuit board
Signal interface circuit board
Circuit board name
Control circuit board Lot number indication
Volt-free control inputPower interface circuit board
0-10 V sensor input
Caution:
The power interface circuit board is not insulated from the power line (high voltage part), except for the con-
nection part (CN132) with the signal interface circuit board. Also, even when the power supply is cut off, the
capacitor is charged. Therefore, wait for at least five minutes before starting work.