Toshiba VN250-SE, VN-1KSAE SERVICE MANUAL
FILE NO. A02-012
Revised on : 2005/Feb./15
SERVICE MANUAL
HEAT EXCHANGE VENTILATORS
VN-250SE
VN-350SE
VN-500SE
VN-800SE
VN-1KSAE
VN-500SE
PRINTED IN JAPAN, Jan.,2003 ToMo
CONTENTS
1. SAFETY CAUTIONS ................................................................................. 3
2. TECHNICAL POINTS (PERFORMANCE) ............................................... 7
3. REFERENCE DRAWING FOR INSTALLATION ...................................... 7
4. SPECIFICATIONS...................................................................................... 8
5. NAME AND DIMENSION OF EACH PARTS.......................................... 11
6. WIRING DIAGRAM .................................................................................. 12
7. OWNER’S MANUAL (EXTRACT) ........................................................... 13
8. INSTALLATION MANUAL (EXTRACT) .................................................. 19
9. HOW TO DIAGNOSE THE TROUBLE..................................................... 24
10. HOW TO REPLACE THE MAIN PARTS.................................................. 25
11. CHECK WHEN REPAIR WORK COMPLETED...................................... 28
12. Q & A FOR HEAT EXCHANGE VENTILATORS .................................... 29
13. EXPLODED VIEWS AND PARTS LIST .................................................. 30
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1. SAFETY CAUTIONS
The important contents concerned to the safety are described on the ventilator body and in this Service manual.
Preserve the described items after understanding clearly the following contents (indications/illustration symbols)
and reading this manual thoroughly.
n Explanation of indications
Indication
DANGER
WARNING
CAUTION
Damage of property : expanded damage concerned to property/household effects or domestic animals/pets
*
Indicates the contents which a danger such as death or serious injury is caused in
emergency on the repair engineers or the surrounding third party by an incorrect work.
Indicates the contents which a possibility such as death or serious injury is caused on the
repair engineers or the surrounding third party by an incorrect work, or on the customers
by a trouble of the products.
Indicates the contents which occurrence of injury (*) or damage of property is supposed
on the repair engineers or the surrounding third party by an incorrect work, or on the
customers by a trouble of the products.
Meaning
n Explanation of illustration symbols
Illustration symbol Meaning
Indicates prohibition (Never do it.).
The concrete contents of prohibition are indicated with illustrations or descriptions near
the illustration symbol.
Indicates forced work (Necessarily do it.).
The concrete contents of forced work are indicated with illustrations or descriptions near
the illustration symbol.
Indicates cautions (including danger/warning).
The concrete contents of cautions are indicated with illustrations or descriptions near the
illustration symbol.
1-1. Warning and caution exclusive in service work
WARNING
• Be sure to ask the customers not to let children close to the work place.
The tools or disassembled parts may cause an injury on children.
• Be sure to turn off the breaker before work when power-ON is unnecessary such as a case of
disassembling.
If doing so, an electric shock may be caused.
• Use the substitute parts corresponded to the model for repair. And do not modify the products.
It causes an abnormal operation or a trouble resulted in leakage or fire, that is a cause of customers’
disaster.
• For connection of the cut lead cables, connect the cables with application terminals, direct the closed
end side upward, and then apply the draining process.
If the post-process of connection is not carried out, a cause of customers’ disaster such as leakage or fire
generates.
• After the work, check the insulation resistance between live part (pin of SL terminal) and non-current
carrying part (motor frame) using a insulation megger (500V) and confirm 10MW or more is kept.
If the insulation resistance is not confirmed, a cause of customers’ disaster such as leakage or fire generates.
CAUTION
• Use the protective materials such as gloves, etc. for check/repair inside of the unit.
If touching inside of the unit with bare hands, an injury may be caused.
– 3 –
1-2. DANGER/WARNING/CAUTION Described in Owner’s Manual
DANGER
• Do not use as an air circulators for open-type burners (heaters).
When gas or oil stoves are used in the home, separate equipment for circulating the air should be used.
WARNING
• When any abnormal condition (scorching smell or others) is found, stop the operation immediately
and keep the exclusive circuit breaker “OFF”.
If you continue the operation without removing the cause, it could cause an electric shock or a fire.
• When the system needs a repair, consult your dealer.
• When the system is checked and the power cable undergoes maintenance, stop the operation, and
switch the exclusive circuit breaker “OFF”.
The internal fan is revolving at high speeds and can cause serious injury. And when using a stepladder,
etc., make sure to fix it properly.
• The external air intake opening should be positioned away from the exhaust openings of combustion
gases etc.
The intake of such gasses could lead to a lack of oxygen in the room.
• If there is combustible gas leakage from other appliances, ventilate the room by opening windows.
If operation were to be attempted in such a situation, sparking at electrical contact points could cause an
explosion.
• Netting or something similar should be provided at the external air intake opening to prevent birds
etc. interfering with the unit.
Nests or other foreign objects should be removed. That could lead to a lack of oxygen in the room.
• If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a
similarly qualified person in order to avoid a hazard.
• The external air intake opening should not be positioned where discharged air may directly enter it.
A situation like this will lead to the room being contaminated and this may pose a health risk.
• When Heat Exchange Ventilators are relocated, contact your dealer or a professional installer.
Improper practice of installation could cause a drop of the unit, a water leakage, an electric shock or a
fire.
• Ask the sales office or the engineering shop to perform the work.
• Don't push a finger or a stick into the open-air inlet or the exhaust outlet.
A fan with a high rpm will injure you.
• Modification of the system is strictly prohibited.
Improper practice of repair could cause a water leakage, an electric shock or a fire.
• When the system needs a repair, consult your dealer.
– 4 –
CAUTION
• If Heat Exchange Ventilators are not used for a long period of time, keep the exclusive circuit
breaker “OFF” for safety reasons.
If the power is left on, any build-up of dust could cause a heat generation or a fire.
• The system should never be used for any other purposes than intended such as for preservation of
foods, flora and fauna, precision devices or work of art.
• It could cause deterioration of foods or other problems.
• Install at a stable place of sufficient strength.
Please note that there might be some places not strong enough to install due the structure of building.
• Provide an exclusive circuit breaker that can completely break contacts on all the poles by more
than 3mm through direct connection to the power terminals.
Depending upon the environment for installation, it becomes necessary to install an earth leakage
breaker. Unless the earth leakage breaker is installed, it could cause an electric shock.
• Ask the sales office or the engineering shop to perform the work.
• Never fail to install the unit inside the heat insulting walls or, in other words, in the space insulated
from the open air.
If you install it outside or in the space equivalent to the open-air conditions, dew is condensed inside the
body in the winter season.
• The filter should be cleaned regularly.
Dust or dirt building-up on it can lead to a lack of oxygen in the room.
• Use gloves when cleaning the filter or heat exchange element.
Doing so will reduce any possibility of injury.
• It is strictly prohibited to place a container of combustible gas or liquid near Heat Exchange Ventilators or to spray it directly with the gas or liquid.
It could cause a fire.
• Do not use outside the rated voltage.
It could cause a fire or an electric shock.
• Combustion apparatus should not be placed allowing a direct exposure to wind of Heat Exchange
Ventilators.
Incomplete combustion could occur on the apparatus.
• Don’t put a container of water on Heat Exchange Ventilators.
When water spills, it is likely to enter inside the unit and degrade electric insulation, possibly resulting in
an electric shock.
• Don’t incline Heat Exchange Ventilators when taking them out.
Otherwise, water remaining inside is likely to drop and wet the furniture or other property.
• Ask the sales office or the engineering shop to perform the work.
• Do not install in locations where harmful or corrosive gasses may be present (i.e. acidic, alkali,
organic solvent, paint gasses etc. from machinery or factories)
Installation in such a location could cause a gas-poisoning and a fire.
• Do not install in locations where oily smoke or soot may be present.
There is a possibility that oil will adhere to the filter, heat exchange
• Do not install in locations with high humidity, such as close to bathroom etc.
Installation in such a location could cause a breakdown.
• Don’t use benzene or metal brush when cleaning the filter and heat exchange element.
Otherwise, the unit will get unfit for use.
• Don’t blow directly against animals or plants.
Likely to cause bad effect on animals and plants.
element etc.
and make operation impossible.
• Do not wash Heat Exchange Ventilators with water.
It could cause an electric shock.
• Do not handle switches with a wet hand.
It could cause an electric shock.
– 5 –
1-3. WARNING/CAUTION Described in Installation Manual
WARNING
Never fail to ask the sales office from which you bought the unit or the installing service shop to install the
unit. If you install it by yourself, any inappropriate installing works would cause an electric shock or a fire.
Carry out the installing works accurately in line with this installation manual. Improper practice of installation
could cause an electric shocks or a fire.
Choose the installing place where is endurable in quality as well as in weight, then install the unit accurately
with adequate strength and completeness of installation in accordance with the installation manual.
Otherwise, it is likely to cause an electric shock, a fire, a drop of the unit, thus causing the injury on the
human body.
Carry out electrical work in accordance with the laws and regulations prevailing in the country concerned,
technical standard and explanation for work, and make absolutely sure that an exclusive circuit is used.
Any insufficient capacity of power circuit and improper work can result in electric shock and fire hazard.
The external air intake opening should be positioned away from the exhaust openings of combustion gases
etc. The intake of such gases could cause a lack of oxygen in the room.
Netting or something similar should be provided at the external air intake opening to prevent birds etc.
interfering with the unit. Nests or other foreign objects should be removed.
That could cause a lack of oxygen in the room.
When the system is checked and the power cable undergoes maintenance, stop the operation, and switch
the exclusive circuit breaker “OFF”. Otherwise, it could cause an electric shock.
Carry out the GND work. Never connect the GND wire to a gas pipe, a water supply pipe, a lightning conductor, a GND line of a telephone, etc. An incomplete GND wire is likely to cause an electric shock.
CAUTION
Provide an exclusive circuit breaker that can completely break contacts on all the poles by more than 3mm
through direct connection to the power terminals. Depending upon the environment for installation, it becomes necessary to install an earth leakage breaker.
When you want to pierce the metal duct through the metal lath or the wire lath or the metal plate of the
wooden facility, do not forget to insulate electrically between the duct and the wall.
Otherwise, it would cause an electric shock or an electric leakage.
Don’t use other parts than specified (including the auxiliary parts) for installing works.
If you do not use the specified parts, it is likely to cause a drop of the unit, a fire, an electric shock, etc.
Install the outdoor duct in a falling gradient toward the outside so as to prevent water from coming in.
If it is not installed so, the building is likely to be flooded, wetting the household effects.
Heat-insulate the outdoor duct (including the indoor side, if necessary) to prevent dewing.
If heat insulation is not adequate, water likely goes indoor and wets the household properties.
When it is high humid and high temperature inside the ceiling, a ventilation system must be installed inside
the ceiling. Otherwise, it could cause a fire or an electric leakage.
Connect the power line and the connecting line with accuracy using the specified cables and fix them firmly
so as not to put the outer stress of the cables on the pin connecting area.
Incomplete connection or fixing is likely to cause a heat generation or a fire.
Install the power line and the connecting line with accuracy so the power source cover may not float.
If the installation of the power source cover is inappropriate, the pin connection area is likely to cause a heat
generation, a fire and an electric shock due to dust or powder.
Never install the unit near the place where there is a fear of leakage of an inflammable gas.
If gas happens to leak and stays around the unit, it is likely to cause a fire.
Don’t use the unit at the other voltages than the rated one. It could cause a fire or an electric shock.
Do not install the unit in locations with large amounts of oily smoke, such as food preparation areas.
It could cause a fire.
Don’t install the unit at the place of a high temperature or a flame. It could cause a heat generation or a fire.
Do not install in locations where harmful or corrosive gasses may be present (i.e. acidic, alkali, organic
solvent, paint gasses etc. from machinery or factories).
Installation in such a location could cause a gas-poisoning and a fire.
Do not install in locations with high humidity, such as close to bathroom etc. It could cause an electric shock
or an electric leakage etc.
– 6 –
2. TECHNICAL POINTS (PERFORMANCE)
• Energy-saving ventilation to save the cooling/heating cost because the heat energy (outside
air load) to be lost by ventilation is effectively recovered.
• Compact construction to downside the cooling/heating equipment with size corresponding
to heat energy amount to be recovered because the outside air load can be vastly decreased.
• By using the heat exchanger, humidity control effect which sucks the humidity approached
to near the humidity in the room.
• Comfortable ventilation by simultaneous air suction/discharge which sucked air approached
to the temperature in the room and the stable ventilation to be performed even in the high
airtight room.
• Noise-proof effect to prevent entering of outside noise or flowing of noise to outside.
• Suction/discharge air system on straight line which is easy to be designed or installed.
• The high-level long filter is mounted to increase the effect of dust collection for removing.
( Weight: 82%)
• Reverse installation up and down is possible, which 2 units use the same check port.
• Especially powerful notch is mounted, which can increase air volume and is selectable in the
main unit.
• Only one check port is used for all the maintenance works.
3. REFERENCE DRAWING FOR INSTALLATION
Supply Air Duct
SA
(Supply Air)
RA
(Outside Air)
Inside Supply Opening
(Supply/Exhaust Air Grill)
Pipe Hood
OA
(Outside Air)
Outside Intake Duct
EA
(Exhaust Air)
Heat Insulation
Material
Ceiling Suspension Bolt
Room Intake Duct
Room Intake Opening
(Supply/Exhaust Air Grill)
Exhaust Air Duct
Pipe Hood
– 7 –
<VN-250SE, VN-350SE>
4. SPECIFICATIONS
Model
Type
Ventilation system
Rating
Current (A)
Power consumption (W)
Air volume (m³/H)
Static pressure (pa)
CharacteristicsConstruction
Noise (dB)
Temp. exchange rate (%)
VN-250SE VN-350SE
Concealed duct type
Heat exchange Normal ventilation Heat exchange Normal ventilation
50Hz 220 – 240V, 60Hz 220V
Extra
high high high high
0.48–0.5 0.46–0.48 0.37–0.39 0.47–0.5 0.46–0.480.37–0.390.63–0.65 0.59–0.6
50Hz
60Hz
0.59 0.55 0.39 0.59 0.55 0.39 0.85 0.75 0.67 0.83 0.74 0.67
104–119 99–114 79–90 103–119 98–114 79–90 137–154 124–137 117–128 133–151 119–132 113–125
50Hz
60Hz
128 118 78 128 118 7 7 178 149 132 176 145 131
250 250 170 250 250 170 350 350 280 350 350 280
50Hz
60Hz
250 250 135 250 250 135 350 350 240 350 350 240
90 80 37 90 80 37 95 65 42 95 65 42
50Hz
60Hz
125 100 30 125 100 30 155 90 43 155 90 43
27–28 26–27 21–22 27–28
50Hz
60Hz
28 26 21 28 26.5 21.5 33 30 22 33 30 23
75 75 77 ——— 75 75 77 ———
50Hz
60Hz
75 75 78 ——— 75 75 79 ———
High Low
Extra
High Low
26.5–27.5 21.5–22.5
Extra
31–32 29–30 25–26 31–32 30–31 26–27
High Low
0.56–0.57 0.61–0.63
Extra
0.57–0.6
High Low
0.54–0.56
(%)
In heating
In cooling
Enthalpy
exchange
rate
Frame
Motor
Sirocco fan
Heat exchanger
Filter
Adapter
Mounting pipe diam. (m m )
External dimension
(Length x Width x Height)
Product mass (kg)
Shape
Dimension
(Length x Width x Height)
Mass (kg)
Package
No. of stacked boxes
70 70 73 ——— 69 69 71 ———
50Hz
70 70 75 ——— 69 69 73 ———
60Hz
50Hz
63 63 66 ——— 66 66 69 ———
63 63 68 ——— 66 66 71 ———
60Hz
Zinc iron plate
4-pole capacitor dielectric motor (E type)
ABS resin
Combustion-proof sheet
Nonwoven fabric (Collection effect weighing method 82%)
ABS resin
Ø150
(mm)
(mm)
599 x 882 x 270 804 x 882 x 270
29 37
Corrugated board package/ventilator
335 x 1138 x 795 335 x 1138 x 1000
34 42
4
Accessory
• Installation Manual: 1, • Owner’s Manual: 1
– 8 –
<VN-500SE, VN-800SE>
Model
Type
Ventilation system
Rating
Current (A)
Power consumption (W)
Air volume (m³/H)
Static pressure (pa)
Characteristics
Noise (dB)
Temp. exchange rate (%)
VN-500SE VN-800SE
Concealed duct type
Heat exchange Normal ventilation Heat exchange Normal ventilation
50Hz 220 – 240V, 60Hz 220V
Extra
high high high high
0.86–0.9 0.79–0.81 0.72–0.73 0.84–0.88 0.76–0.77 0.71–0.73 1.51–1.54 1.48–1.5 1.44–1.46 1.47–1.5 1.45–1.48 1.41–1.43
50Hz
60Hz
1.14 1.0 0.81 1.12 0.96 0.8 2.05 1.92 1.68 2.04 1.87 1.68
188–214 169–188 151–166 184–210 161–182 145–164 316–347 309–329 302–327 309–337 300–325 297–316
50Hz
60Hz
244 202 162 243 196 161 424 391 347 417 387 346
500 500 370 500 500 370 800 800 650 800 800 650
50Hz
60Hz
500 500 310 500 500 310 800 800 575 800 800 575
105 70 38 105 70 38 140 110 70 140 110 70
50Hz
60Hz
165 85 33 165 85 33 190 100 50 190 100 50
33–34 31–32 25–26 34–35 32–33 26.5–27.5 38–39 36.5–37.5 32–34 38.5–39.5 37–38 33–35
50Hz
60Hz
35 31 23 36 33 24 39 36 31 39.5 37 31
75 75 77 ——— 75 75 76 ———
50Hz
60Hz
75 75 79 ——— 75 75 77 ———
High Low
Extra
High Low
Extra
High Low
Extra
High Low
(%)
In heating
In cooling
Enthalpy
exchange
rate
Frame
Motor
Sirocco fan
Heat exchanger
Filter
Adapter
Construction
Mounting pipe diam. (m m )
External dimension
(Length x Width x Height)
Product mass (kg)
Shape
Dimension
(Length x Width x Height)
Mass (kg)
Package
No. of stacked boxes
67 67 71 ——— 71 71 74 ———
50Hz
67 67 74 ——— 71 71 75 ———
60Hz
50Hz
62 62 67 ——— 65 65 68 ———
62 62 69 ——— 65 65 69 ———
60Hz
Zinc iron plate
4-pole capacitor dielectric motor (E type)
ABS resin
Combustion-proof sheet
Nonwoven fabric (Collection effect weighing method 82%)
Zinc iron plate
Ø200 Ø250
(mm)
(mm)
904 x 962 x 270 884 x 1322 x 388
43 71
Corrugated board package/ventilator
335 x 1218 x 1100 453 x 1538 x 1075
48 79
43
Accessory
• Installation Manual: 1, • Owner’s Manual: 1
– 9 –
<VN-1KSAE>
Model
Type
Ventilation system
Rating
Current (A)
Power consumption (W )
Air volume (m²/H)
Static pressure (pa)
Noise (dB)
Characteristics
Temp. exchange rate (%)
Enthalpy exchange rate
Frame
Motor
Sirocco fan
Heat exchanger
(%)
In heating
In cooling
VN-1KSAE
Concealed duct type
Heat exchange Normal ventilation
50Hz 220 – 240V
Extra high High Low Extra high High Low
1.97–2.04 1.85–1.93 1.68–1.76 1.95–2.03 1.84–1.92 1.67–1.74
399–445 360–399 332–367 392–438 358–392 329–362
1000 1000 810 1000 1000 810
90 55 35 90 55 35
37.5–38.5 36–37 31–33 38–39 36.5–37.5 31.5–33.5
75 75 76 ———
71 71 73 ———
65 65 68 ———
Zinc iron plate
4-pole capacitor dielectric motor (E type)
ABS resin
Combustion-proof sheet
Filter
Adapter
Construction
Mounting pipe diam. (m m )
External dimension
(Length x Width x Height)
Product mass (kg)
Shape
Dimension
(Length x Width x Height)
Mass (kg)
Package
No. of stacked boxes
Accessory
(mm)
(mm)
Nonwoven fabric (Collection effect weighing method 82%)
Zinc iron plate
Ø250
1134 x 1322 x 388
83
Corrugated board package/ventilator
453 x 1538 x 1325
91
3
• Installation Manual: 1, • Owner’s Manual: 1
– 10 –
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