Mitsubishi Electric VL-50S2 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
HANDBOOK
MODELS
VL-50S2-E
VL-50ES2-E
VL-50SR2-E
Nameplate
July 2017 No. U224-A
Filter (Optional)
P-50F2-E
P-50HF2-E
Pipe (Optional)
P-50P-E
P-50PJ-E
Hood (Optional)
P-50VSQ5-E

Contents
1. Safety precautions .................................................................... 3-4
2. Changed points ........................................................................... 4
3. Names and functions of components .......................................... 5
4. Specifications ............................................................................... 6
5. Outside dimensions................................................................... 7-8
6. Electrical wiring diagrams ............................................................ 9
7. Circuit board diagrams ..........................................................10-11
8. Principles of operation ............................................................... 12
9. Troubleshooting
.................................................................... 13-17
10. Before receiving repair requests ............................................... 17
11. Service inspection list ................................................................ 18
12. Overhauling procedures ....................................................... 18-31
12-1 VL-50S2-E, VL-50ES2-E .................................................................... 18-24
12-2 VL-50SR2-E ...................................................................................... 25-31
13. Parts catalog ......................................................................... 32-44
VL-50S2-E....................................................................... 33-36
VL-50ES2-E .................................................................... 37-40
VL-50SR2-E .................................................................... 41-44

─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 incorrectly are described with the warning
symbols shown below.
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.
Improper handling of the product may result in slight 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 work regulations and the installation
manual.
(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.)
Turn off the power supply
Be sure to unplug the power cord, or shut off the
circuit breaker 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
● Make sure that an earth leakage breaker and an overload protection device are installed, if they are not in-
stalled, recommend the customer to install one.
Wear gloves
Wear a pair of gloves when servicing.
(Failure to observe this caution may
result in injury to your hands from sharp
metal or other edges.)
1. Safety precautions
Warning
Caution
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Be sure to follow
this instruction.
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 ─
Precautions for soldering
Lead-free solder is used for the circuit boards of this product, and " " is marked on the circuit boards.
Observe the following precautions.
●When making repairs on these circuit boards, lead-free solder must be used.
●Make sure to use dedicated soldering irons to lead-free solder. (Do not use soldering irons that are used for
Sn-Pb [tin-lead] eutectic solder)
●It is recommended to use soldering irons having power consumption of 40 W or more.
2. Changed points
Item New model Previous model
VL-50SR2-E VL-50S2-E VL-50ES2-E
Operation
means
Remote controller
Pull cord switch Control switch
(Wall switch)
Shape of
main circuit
board
80x129 mm 80x80 mm
Wiring for
terminal
block
Two wires Three wires
Terminal blockPower cable
L
Terminal blockPower cable
Display
Display
Operation lamp
Operating mode
selection switch
Remote controller
receiver
Pull cord
(VL-50S2-E only)
Display
Operation lamp

─5 ─
3. Names and functions of components
Hook
Panel
<Front panel>
Outside air filter
<Filter>
Exhaust air filter
<Filter>
Operation lamp
Wire (fall prevention)
Lossnay Core
(Heat exchanger)
Shutter knob
Pull cord
<Switch>
(VL-50S2-E only)
Display
(Remove the provided
protective sheet.)
Vertical mounting joint C
<Joint pipe>
Air supply/exhaust pipes A
<Pipe> (2 pcs.)
Joint pipe B
<Joint pipe>
Weather cover
Remote controller
(VL-50SR2-E only)
Note:
The names in the angle brackets < >
show the part names in the parts catalog.
About the filters Features
Exhaust air filter
For
Exhaust
air
The filter prevents clogging of the internal compo-
nents.
Outside air filter
(Replacement filter: P-50F2-E)
For
Supply
air
When Lossnay takes in outside air to a room, the
filter collects dust, sand, pollen or the likes from
outside air.
Note: Some fine particles or tiny insects may pass
through the filter. The high performance filter
is recommended for higher collecting effect.
Outside air filter can be replaced with the following high performance filter.
High performance
filter
(Optional parts)
(P-50HF2-E)
For
Supply
air
The filter collects dust more efficiently than the
outside air filter.

─6 ─
4. Specifications
Model Supply
voltage (V)
Frequency
(Hz) Notch
Power
consumption
(W)
Air volume
(m3/h)
Temperature
exchange efficiency
(%)
Noise
(dB)
Weight
(kg)
VL-50S2-E
VL-50ES2-E
220 50 HI 19 51 70 36.5
6.2
LO 4 15 86 14
230 50 HI 20 52.5 69 37
LO 4.5 16 85 15
240 50 HI 21 54 68 37.5
LO 5 17 84 15.5
220 60 HI 21 54 68 37.5
LO 5.5 17 84 15.5
VL-50SR2-E
220 50 HI 19 51 70 36.5
6.2
LO 4.5 15 86 14
230 50 HI 20 52.5 69 37
LO 5 16 85 15
240 50 HI 21 54 68 37.5
LO 5.5 17 84 15.5
220 60 HI 21 54 68 37.5
LO 6 17 84 15.5
* Noise values may be higher than those listed depending on the structure of the room.

─7 ─
5. Outside dimensions
VL-50S2-E, VL-50ES2-E, VL-50SR2-E
198.5
φ180
108
109
96.5
40
198.5
28
φ
180
108
109
168
2°
522
φ114
245
Air supply/
exhaust hole
Air supply
hole
Air supply
hole
Power cable
(VL-50S2-E only)
Pull cord
(VL-50S2-E only)
Pull cord
Display
Weather cover
Mounting plate
Mounting plate
Weather cover
Air supply/exhaust
pipe
Air supply/exhaust
pipe
Shutter knob
Shutter
knob
Indoor air
exhaust hole
About 400
Indoor air
exhaust hole
Indoor air
exhaust hole
Indoor air
exhaust hole Wall thickness
50 to 650
Wall
thickness
120 to 730
For horizontal mounting
For vertical mounting
151.5
223.5
216
245
40.539.5
21 11.5
26.5
20×8＝160
300
200
184
210.5 522
182 193
310 360
125
Mounting plate
Center line
Air supply/exhaust
hole
(ø120 wall hole)
Mounting plate temporary
fixing hole position (For horizontal mounting)
Unit hanging screw position
ŶMounting position diagram (seen from inside)
(For horizontal mounting)
Edge of main unit Mounting hole 53 – ø6
Power and connection
cable pullout area
(VL-50ES2-E only)
min. min.
min. min.
Power cable
(VL-50S 2 -E only)
Mounting plate
temporary fixing hole
position
(For vertical mounting)
Unit hanging screw
position
(For vertical mounting)
(VL-50S2-E only)
Display
(The figure shows
VL-50S2-E/VL-50ES2-E.)
Attach the twisted part of
the vertical mounting joint C
toward the indoor side.
* For vertical mounting, the
display comes to the lower
side. (The unit cannot be
mounted upside down.)
ŶRemote controller
(VL-50SR2-E only)
1054
88
Unit (mm)

─8 ─
P-50F2-E
154
76
13
Unit (mm)
P-50HF2-E
153
76
8
Unit (mm)

─9 ─
6. Electrical wiring diagrams
(1) Switch wiring diagrams
VL-50ES2-E
Terminal block Switch Circuit breaker
220/230/240 VAC 50 Hz
220 VAC 60 Hz
Red
White
Blue
VL-50SR2-E
Terminal block Circuit breaker
220/230/240 VAC 50 Hz
220 VAC 60 Hz
Red
White
(2) Motor coil diagram
VL-50S2-E, VL-50ES2-E, VL-50SR2-E
Coil resistance at a temperature of 30°C
0FRLOȍ6FRLOȍ
Red
Black
White
Thermal fuse
145Υ

─10 ─
(2) VL-50ES2-E (Wall switch type)
7. Circuit board diagrams
Circuit board diagrams and check points
(1) VL-50S2-E (Pull cord type)

Switch with a pull cord
Motor 
Phase advance capacitor
2 ȝF
Voltage-dividing capacitor
ȝ)ȝ)


＜Main circuit board＞
VL-35-A
＜Display circuit board＞
VL-35-B
Blue
White
Red
Not in use
220/230/240 VAC 50 Hz
220 VAC 60 Hz
AC power supply input
White connector
Power cord
White connector
White connector
White connector
Operation lamp
(green)
Blue
White


Motor 

Not in use

Terminal block
Control switch
White connector
White connector
Red
Operation lamp
(green)
＜Display circuit board＞
VL-35-B
＜Main circuit board＞
VL-35-A
Not in use
Phase advance capacitor
2 ȝF
220/230/240 VAC 50 Hz
220 VAC 60 Hz
AC power supply input
Voltage-dividing capacitor
ȝ)ȝ)
White connector