Mitsubishi Electric VL-250CZPVU-L-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.
HANDBOOK
MODELS
VL-250CZPVU-L-E
VL-250CZPVU-R-E
VL-350CZPVU-L-E
VL-350CZPVU-R-E
Nameplate
March 2021 No. U295-A
Filter (Optional)
P-250F-E P-350F-E
P-250SF-E P-350SF-E
P-250MF-E P-350MF-E
P-250PF-E P-350PF-E
P-250NF-E P-350NF-E
RC cover (Optional)
P-RCC-E
* The figure shows VL-350CZPVU-R-E.
LOSSNAY HEAT RECOVERY VENTILATOR

Contents
─ 2 ─
Contents
1. Safety precautions .......................................................................... 3
2. Names and functions of components.............................................. 4
3. Specifications.................................................................................. 6
4. Outside dimensions ........................................................................ 8
5. Electrical wiring diagrams ............................................................. 13
6. Circuit board diagrams.................................................................. 14
7. Principles of operation .................................................................. 17
8. Troubleshooting ............................................................................ 23
9. Service inspection list ................................................................... 44
10. Overhauling procedures.............................................................. 45
10-1 VL-250CZPVU-L type, VL-250CZPVU-R type......................................46
10-2 VL-350CZPVU-L type, VL-350CZPVU-R type......................................65
11. Parts catalog ............................................................................... 81
VL-250CZPVU-L-E .......................................................................................82
VL-250CZPVU-R-E.......................................................................................88
VL-350CZPVU-L-E .......................................................................................94
VL-350CZPVU-R-E.....................................................................................100
3
4-5
6-7
8-12
13
14-16
17-22
23-43
44
45-80
46-64
65-80
81-105
82-87
88-93
94-99
100-105

─ 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. 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
No. Name Function
1 Exhaust air filter It prevents heat exchanger from clogging.
2 Exhaust air filter case It holds the exhaust air filter
3 Optional air filter case For optional filter (See the table below.)
4 Filter cover -
5 Drain pipe attachment It is connected to drain pipe.
6 Control box It holds circuit board
7 Name plate It shows product name and serial No.
8 Outdoor air filter It removes insects, pollen, dirt, dust, and other particles from the outdoor air that is
taken into the room.
9 Outdoor 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)
Optional filter
Filter name MODEL Applicable model Location to use Main
material
Replacement
intervals
Replacement filter P-250F-E VL-250CZPVU-L-E/VL-250CZPVU-R-E RA, OA
L Type
R Type
RA: Return Air
OA: Outdoor Air
SA: Supply Air
PET,
acrylic fiber Three years
P-350F-E VL-350CZPVU-L-E/VL-350CZPVU-R-E
Standard filter P-250SF-E VL-250CZPVU-L-E/VL-250CZPVU-R-E
RA, OA, SA
Polypropylene,
polyester
One year
P-350SF-E VL-350CZPVU-L-E/VL-350CZPVU-R-E
Medium efficiency
filter
P-250MF-E VL-250CZPVU-L-E/VL-250CZPVU-R-E
RA, OA, SA One year
P-350MF-E VL-350CZPVU-L-E/VL-350CZPVU-R-E
PM2.5 filter
P-250PF-E VL-250CZPVU-L-E/VL-250CZPVU-R-E
RA, OA, SA
For SA
installation:
One year
For OA
and RA
installations:
Six months
P-350PF-E VL-350CZPVU-L-E/VL-350CZPVU-R-E
NOx filter P-250NF-E VL-250CZPVU-L-E/VL-250CZPVU-R-E SA Pulp Six months
P-350NF-E VL-350CZPVU-L-E/VL-350CZPVU-R-E
* When a NOx filter and an optional dust catch filter (P-250/350SF-E, P-250/350MF-E, P-250/350PF-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

─ 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)
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 ─
3. Specifications
Model VL-250CZPVU-L-E, VL-250CZPVU-R-E
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] 1.32
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] 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
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 ─
4. Outside dimensions
VL-250CZPVU-L-E
202202
2088181
φ 122
51
56514
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)

─ 9 ─
VL-250CZPVU-R-E
202202
88
181
32
595
φ122
224219
86
318
269
115
10 356 20
40
40
30179179179
20
242
51
56514
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)

─ 10 ─
VL-350CZPVU-L-E
20
192 222
20
222 192
209 112
31
8462315
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)