LG R5TT20F-SA0 User manual

Printed in Sep. 12. 2023

Heat Pump Water Heater
- 60 Hz (R134a)
1. Models Line Up
2. Nomenclature
3. Specification
4. Function List
5. Dimensional Drawings
6. Wiring Diagrams
7. Refrigerant Cycle Diagrams
8. Capacity Tables
9. Capacity Coefficient Factor
10. Operation Range
11. Electric Characteristics
12. Sound Levels (Reference Data)
13. Carrying Method
14. Installation
15. Controller

Heat Pump Water Heater - 60 Hz ( R134a)
1. Models Line Up
2
Category Picture Chassis Model NameNominal Volume
[L(gal)]
RF R5TT20F-SA0 220 (58)

2. Nomenclature
3
1 2 3 4 5 6 7 8 9 10 11
R 5 T T 2 0 F - S A 0
Code Type Code of Model Meaning
1Product Type A~Z R: Heat Pump Water Heater
2 Refrigerant 0~9
2: R22
3: R32
4: R410A
5: R134a
6: R290
3 A~Z
T: Packaged
- : Set
N: Indoor unit
U: Outdoor unit
A: C/SKD Indoor unit
B: C/SKD outdoor unit
M: Mock-up
4 Compressor type A~Z T: Inverter Heating Only
W: Inverter Heating & Cooling
5, 6 0~9 Water tank capacity
Ex. “20” → 200 liters
7 A~Z
8
Capacity
Indoor unit platform
Outdoor unit platform A~Z
F: Frontier
-: Packaged (No outdoor unit)
9 Look/Color A~Z S: Frontier Silver
B: Frontier Black
10 Function A~Z
11 Serial No. 1~9
A: Smart function + Hybrid mode
LG Model Development Serial No.
Heat Pump Water Heater - 60 Hz ( R134a)

Heat Pump Water Heater - 60 Hz ( R134a)
3. Specifications
4
Note
• – : No Relation
• For Circuit Breaker Rating, please conform to local standards whenever necessary.
Exteriorcolorcodeisapproximatevalue.
•
•Itisdifficulttomeasureairflowrateofsleepbecauseof smallvalues.
• Maximum heating capacity is for heating operation without any frost.
•Somespecificationsmaybechangedwithoutnotificationsdue toourpolicyofinnovation.
BuyerModel Set(Indoor/Outdoor) Unit R5TT20F-SA0
FactoryModel R5TT20F-SA0
Volume(Norminal) 58(220L)
Volume(Rated) 52(197.7L)
UEF 3.75
FHR Gallon(L) 66(249.8)
FHR(TurboMode) Gallon(L) 80(302)
AnnualEnergyConsumption kWh 866
PowerInput UpperElementWattage(208V/240V) kW 3.8/5.0
LowerElementWattage(208V/240V) kW 3.8/5.0
EnergyStar -Yes
TaxCredit --
PowerSupply Ø,V,Hz 1Φ,208-240V,60Hz
AvailableVoltageRange V 176~276
Indoor
AirFlowRate H/M ㎥/min 6.7/4.4
H/M CFM 236.6/155.4
RPM H/M - 1000/700
SoundPressureLe
vel Auto dB(A)+3 40
SoundPressureLe
vel Turbo/HeatPump dB(A)+3 42
SoundPowerLevel dB(A) -
Dimensions
Net(WxHxD) mm 580x1625x582
in. 2253/64x63 31/32x22 29/32
Shipping(WxHxD) mm 738x1775x690
in. 29 1/16x697/8x27 11/64
Amm 1625
in. 63 31/32
Bmm 580
in. 2253/64
Cmm 998
in. 3919/64
Dmm 147
in. 525/32
Emm 147
in. 525/32
Weight
Net kg 100
lb. 220
Shipping kg 118
lb. 260
OperationRange Heating ℃DB -5~48.9
℉DB 23~120
Max.FuseSize A 13.5
ExteriorColorCode - LuxurySilver
Compressor
Type - TwinRotary
Model - EST092MBA
MotorType - BLDC
OilType/Maker - POE(RB68A)/SunOilorJxNipponorP
VE(FVC68D)/IDEMITSU
OilCharge cc 220
O.L.P.Name - -
RatedLoadAmpere(208V/240V) A 3.3/3.1
Manufacturer/CountryofOrigin - LGElectronics/China
Fan
Type - PropellerFan
MotorType - BLDC
MotorOutput W 43
FullLoadAmpere(FLA) A 0.22
Heat
Exchanger
Evaporator
Material,Tube/Fin - Cu/Al
FinSpacing FPI 21(Φ7)
(ΦxRowxColumnxFPI/FPDM
xL)xNo. #1 (Φ7x3x15x21x390)x1
CorrosionProtection - PCM
Condenser
Material,Tube - Al
(ΦxRowxL)xNo. #1 (Φ8x1x50000)x1
CorrosionProtection - -

3. Specifications
5
Heat Pump Water Heater - 60 Hz ( R134a)
Note
• – : No Relation
• For Circuit Breaker Rating, please conform to local standards whenever necessary.
Exteriorcolorcodeisapproximatevalue.
•
•Itisdifficulttomeasureairflowrateofsleepbecauseof smallvalues.
• Maximum heating capacity is for heating operation without any frost.
•Somespecificationsmaybechangedwithoutnotificationsdue toourpolicyofinnovation.
A
C
DE
B
BuyerModel Set(Indoor/Outdoor) Unit R5TT20F-SA0
FactoryModel R5TT20F-SA0
DesignPressure(System) HighSide - 2.0MPa/290PSI
LowSide - 0.9MPa/130.5PSI
MaxWorkingPres
sure(WaterTank) - 150PSI(1034kPa)
MinimumCircuitAmpacity A 30.1
CircuitBreaker A30
PowerSupplyCable
No. 3
㎟2.5
AWG 10
DrainHoseSize I.D mm 19,12.7
in. 3/4,1/2
Refrigerant
Type - R134a
PreCharge g 650
oz. 23
AdditionalCharge g/m -
oz./ft. -
Control - ElectronicExpansionValve
DefrostMethod - ReverseCycle
Anode Sacrificial
FoamInsulation inch 1.6~2.4
T&PReliefValve -Yes
WaterCnnectionLocation - side
WaterConnectionSize inch 3/4
DigitalDisplay -Yes
Wi-Fi -Yes
TankWarranty year 10

6
Heat Pump Water Heater - 60 Hz (R134a)
4. Function List
Note
• These functions must be applied according to the model. Please refer to the follow ing function list for each model.
•¹ : This function can be operated only w hen the w ired remote controller is connected. The applicability of each function depends on the above table.
• ² : Optional accessories must be purchased separately. If show n as "Embedded", this function is included in product.
• The function Wi-Fi is only compatible w ith 2.4 GHz band. (802.11 b/g/n)
• Some specifications may be changed w ithout notifications due to our policy of innovation.
Category Function Description
Capture dust particles over 10μm in size and finer bacteria.
Reliability Self-diagnostic for product protection.
De-ice Control (Defrost) In the heating mode, de-icing of the outdoor heat exchanger automatically.
Individual
Control Wired Remote Controller ² -
Handheld Wireless Controller -
CAC
Network
Function
General Central Controller (Non LGAP) -
Network Solution (LGAP) -
Dry Contact ² -
PDI (Power Distribution Indicator) ² -
Outdoor Unit PI 485 ² -
Special
Function
Kit
Wi-Fi ² Easily access and control an air conditioner's functions from anywhere.
Water Level Sensor Connection ² Detect the water level in drain pan.
Crank Case Heater Pre-heating the compressor during winter.
Smart Inv erter Monitoring System (SIMs)² Help you to easily monitor, diagnose the air conditioner and get a quick resolution.
Others
This mode minimizes power consumption by using only heat pump for heating.
This mode provides relatively low power consumption and high recovery.
This mode primary uses heat pump for heating.
This mode is factory set mode for shipping.
If power is resupplied after blackout, product restart automatically.
If there is a temperature difference between room temperature and desired temperature,
you can use this function in other to prevent insufficient cooling and insufficient heating.
If there is a temperature difference between room temperature and desired
temperature, you can use this function in other to prevent over-heating.
Set the brightness of the display on the indoor unit.
Two Thermistor Control ¹
Overheating Protection
Convenience
Auto Restart Operation
HeatPump
Auto
Turbo
Vacation
Schedule
This mode provides the highest recovery.
This mode uses heat pump and heating element simultaneously.
This feature is recommended when the water heater is not in used for an extended
period of time.
In this mode, tank temperature will be maintained at about 68°F to minimize energy
consumption and prevent the water heater from freezing.
The Custormer can set up the operation time and mode based on their Demand Condition.
-
Indoor Unit Display Type
Indoor Unit Display Light
Temperature Control Basic cycle control method.
Air
Purifying Prefilter (Washable / Anti-Bacteria)
Self Diagnosis
The air conditioner which DRED is available is capable of DRM1,DRM2 and DRM3 and complies with standard AS/NZS 4755.3.1.
•

5. Dimensional Drawings
R5TT20F-SA0
7
Heat Pump Water Heater - 60 Hz ( R134a)

6. Wiring Diagrams
8
R5TT20F-SA0
Heat Pump Water Heater - 60 Hz ( R134a)

9
Heat Pump Water Heater - 60 Hz (R134a)
7. Refrigerant Cycle Diagrams
577)6$
M
Compressor
Heating
Defrosting
Th4
Th5 Th3
Th2
Th6
Water
Tank
EEV
Heat
Exchanger
(Condenser) Heat
Exchanger
(Evaporator)
Th1
LOC Description PCB Connector
Th1 Thermistor for discharge pipe temperature CN_TH2
Th2 Thermistor for evaporating temperature CN_TEMP_AIR
Th3 Thermistor for indoor air temperature CN_TEMP_AIR
Th4 Thermistor for suction pipe temperature CN_TH1
Th5 Thermistor for upper water tank temperature CN_TANK_D
Th6 Thermistor for lower water tank temperature CN_TANK_U
*EEV : Electronic Expansion Valve.

10
Heat Pump Water Heater - 60 Hz (R134a)
8.Capacity Tables
8.1 Capacity table
1) COP
2) Power Consumption integ. (kWh)
Recovery Time (hour)3)
H/P + Heater Operating
Heater Only Mode
Ambient
temp.
Initial
water tank
temp.(℃)
Setting temp.(℃)
Auto Mode Heatpump Mode Turbo Mode
35 40 45 50 55 60 35 40 45 50 55 60 35 40 45 50 55 60
-5℃
10 1.69 1.45 1.25 1.10 0.99 0.93 2.72 2.64 2.51 2.33 2.12 1.86 1.69 1.45 1.25 1.10 0.99 0.93
20 2.57 1.66 1.46 1.31 1.20 1.14 2.57 2.49 2.36 2.19 1.97 1.71 1.90 1.66 1.46 1.31 1.20 1.14
30 2.30 2.17 1.33 1.22 1.16 2.30 2.17 2.00 1.78 1.52 2.30 1.48 1.33 1.22 1.16
40 1.78 1.56 1.30 1.78 1.56 1.30 1.78 1.04 0.97
50 0.90 1.04 0.90
20℃
10 1.86 1.79 1.67 1.54 1.40 1.25 4.30 4.10 3.91 3.71 3.50 3.30 1.71 1.64 1.56 1.48 1.40 1.31
20 5.73 2.03 1.91 1.78 1.64 1.49 4.15 3.96 3.76 3.56 3.36 3.15 1.79 1.72 1.64 1.56 1.47 1.39
30 4.79 4.37 2.02 1.88 1.73 3.64 3.44 3.24 3.04 2.83 3.64 1.66 1.58 1.49 1.41
40 3.56 3.21 1.97 2.74 2.54 2.33 2.74 1.46 1.37
50 2.54 1.66 1.66
48℃
10 1.95 1.97 1.92 1.80 1.60 1.32 6.00 5.75 5.51 5.30 5.11 4.94 1.79 1.81 1.78 1.71 1.60 1.46
20 10.07 2.21 2.16 2.03 1.83 1.56 5.66 5.41 5.17 4.96 4.77 4.60 2.05 2.07 2.04 1.97 1.86 1.72
30 8.61 7.99 2.07 1.86 1.59 5.09 4.86 4.65 4.45 4.29 5.09 2.31 2.25 2.14 1.99
40 6.12 5.50 1.42 4.35 4.16 3.99 4.35 2.42 2.27
50 3.22 3.72 3.72
Ambient
temp.
Initial
water tank
temp.(℃)
Setting temp.(℃)
Auto Mode Heatpump Mode Turbo Mode
35 40 45 50 55 60 35 40 45 50 55 60 35 40 45 50 55 60
-5℃
10 3.21 4.62 5.97 7.28 8.55 9.77 1.85 2.30 2.93 3.75 4.75 5.93 3.21 4.62 5.97 7.28 8.55 9.77
20 1.20 2.61 3.97 5.28 6.54 7.76 1.20 1.65 2.28 3.10 4.10 5.28 1.21 2.61 3.97 5.28 6.54 7.76
30 0.79 1.43 3.25 4.52 5.74 0.79 1.43 2.24 3.25 4.43 0.79 1.94 3.25 4.52 5.74
40 1.19 2.19 3.69 1.19 2.19 3.37 1.19 2.47 3.69
50 1.62 2.11 1.62
20℃
10 2.31 3.21 4.29 5.53 6.95 8.55 1.10 1.44 1.82 2.26 2.74 3.28 2.39 3.38 4.40 5.46 6.56 7.69
20 0.50 1.36 2.43 3.68 5.10 6.69 0.63 0.97 1.35 1.78 2.27 2.81 0.74 1.72 2.75 3.81 4.91 6.04
30 0.36 0.67 1.64 3.07 4.66 0.45 0.84 1.27 1.76 2.30 0.45 1.09 2.15 3.25 4.39
40 0.52 0.94 2.45 0.72 1.20 1.74 0.72 1.59 2.73
50 0.78 1.15 1.15
48℃
10 2.06 2.67 3.51 4.57 5.87 7.39 0.74 0.98 1.24 1.53 1.84 2.17 2.16 3.04 3.90 4.76 5.60 6.43
20 0.25 0.86 1.70 2.77 4.06 5.58 0.43 0.67 0.93 1.22 1.53 1.86 0.43 1.31 2.17 3.03 3.87 4.70
30 0.17 0.33 0.93 2.22 3.74 0.27 0.54 0.82 1.13 1.47 0.27 0.54 1.40 2.24 3.07
40 0.30 0.53 1.86 0.35 0.66 1.00 0.35 0.71 1.54
50 0.54 0.45 0.45
Ambient
temp.
Initial
water tank
temp.(℃)
Setting temp.(℃)
Auto Mode Heatpump Mode Turbo Mode
35 40 45 50 55 60 35 40 45 50 55 60 35 40 45 50 55 60
-5℃
10 3.00 3.47 3.71 3.90 3.44 3.29 4.96 6.67 7.94 9.05 9.61 9.75 2.70 3.13 3.37 3.56 3.44 3.29
20 3.05 3.25 3.49 3.67 3.15 2.95 3.05 4.67 6.03 7.27 7.28 7.45 2.44 2.89 3.12 3.31 3.15 2.95
30 2.36 3.88 3.67 3.01 2.71 2.36 3.88 5.31 5.01 5.20 2.36 3.06 3.25 3.01 2.71
40 2.42 2.61 2.32 2.42 2.61 2.82 2.42 2.64 2.32
50 0.42 0.42 0.42
20℃
10 2.77 3.06 3.37 3.67 3.98 4.30 2.56 3.29 4.02 4.80 5.57 6.38 1.69 1.95 2.20 2.44 2.68 2.92
20 2.68 2.70 3.01 3.32 3.63 3.94 1.50 2.20 2.91 3.68 4.44 5.25 1.33 1.60 1.84 2.09 2.32 2.56
30 1.81 3.08 3.12 3.44 3.76 1.04 1.74 2.50 3.28 4.09 1.04 1.51 1.76 1.99 2.23
40 2.09 3.53 3.53 1.16 1.94 2.75 1.16 1.65 1.89
50 2.50 1.26 1.26
48℃
10 1.85 2.11 2.34 2.54 2.73 2.91 1.32 1.75 2.28 2.88 3.52 4.17 1.15 1.39 1.64 1.90 2.16 2.41
20 1.60 1.87 2.12 2.35 2.56 2.77 0.80 1.21 1.71 2.27 2.90 3.54 0.83 1.06 1.32 1.57 1.83 2.08
30 1.05 1.76 1.94 2.15 2.36 0.57 1.03 1.56 2.15 2.78 0.57 0.99 1.25 1.50 1.75
40 1.13 1.85 1.98 0.74 1.30 1.91 0.74 1.19 1.43
50 1.31 0.91 0.91

11
8.2 Performance Graph
8. Capacity Tables
Heat Pump Water Heater - 60 Hz (R134a)
Note
1. Allcapacitiesarenet,evaporatorfanmotorheatisdeducted.
2.Directinterpolationispermissible.Donotextrapolate.
3.Capacitiesarebasedonthefollowingconditions:
‐ IndoorAirTemperature:70°F(20.0°C)DB/60°F(15.0°C)WB
0.00
1.00
2.00
3.00
4.00
5.00
6.00
COP
20 30 40 50 60 70 80 90 100 110 120
Ambient Temperature(℉)
H/P
Auto
Turbo
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
COP
20 30 40 50 60 70 80 90 100 110 120
Ambient Temperature(℉)
Auto
Turbo
H/P
LowDraw
watertanktemp.113℉ →125℉
HighDraw
watertanktemp.58℉ →125℉
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
Recovery Time (hour)
20 30 40 50 60 70 80 90 100 110 120
Ambient Temperature(℉)
H/P
Auto
Turbo
watertanktemp.58℉ →125℉
Ambient
Temperature Recovery Time (hour) COP of High Draw COP of Low Draw
℉ Auto H/P Turbo Auto H/P Turbo Auto H/P Turbo
23 3.57 8.69 3.49 1.12 2.13 1.14 2.32 2.37 1.49
24.8 3.63 78.3 13.4 61.1 02.2 61.1 82.3 82.3 1.53
32 3.89 7.10 3.07 1.30 2.45 1.23 2.63 2.44 1.65
41 4.21 5.50 2.65 1.47 2.76 1.33 2.94 2.52 1.81
50 4.01 5.19 2.55 1.51 3.03 1.38 3.55 2.90 2.10
59 3.81 4.88 2.46 1.55 3.30 1.43 4.17 3.29 2.39
68 3.62 4.57 2.37 1.60 3.57 1.49 4.78 3.67 2.67
77 3.42 4.26 2.27 1.64 3.69 1.51 5.39 3.84 2.80
86 3.23 3.95 2.18 1.68 3.81 1.53 6.00 4.01 2.92
95 3.03 3.64 2.09 1.72 3.93 1.56 6.61 4.18 3.05
104 2.84 3.33 1.99 1.77 4.05 1.58 7.22 4.35 3.17
118.4 2.52 2.83 1.85 1.83 5.09 1.79 8.20 5.83 4.28

9. Capacity Coefficient Factor
9.1 Capacity Change Rate (%)
12
Heat Pump Water Heater - 60 Hz ( R134a)
Model
Duct Type. Diameter Not Ducted 8"(Φ200) 6"(Φ150)
R5TT20F-SA0 COP(%) 100.0% 96.7% 92.0%
Duct Length ( 1m / 3.3ft )

9. Capacity Coefficient Factor
9.2 Maximum Duct Length
13
Heat Pump Water Heater - 60 Hz ( R134a)
NOTE
• Total of static pressure must not exceed 55 Pa.
L1
L2 L2 L2
L2
L1
L1
L1
L1
Case 1 Case 2 Case 3 Case 4 Case 5
System Static
Pressure Case Case 1 Case 2 Case 3 Case 4 Case 5
1150 rpm P(Pa) Size Ø 200 Ø 160 Ø 200 Ø 160 Ø 200 Ø 160 Ø 200 Ø 160 Ø 200 Ø 160
Remark Outlet only No Elbow Elbow x 1 Elbow x 1 Elbow x 2
3.6 CMM 55 L1+L2 62 25 55 22 52 19 52 19 49 16
4.5 CMM 43 (m) 31 12 27 10 24 7 24 7 21 4
Allowable duct length
3.6 CMM 4.5 CMM
Component
Smooth Smooth 90˚ Duct adapter Smooth Smooth 90˚ Duct adapter
PVC Duct
(Pa/m) PVC Bend (Pa/EA)
(Suc. &
Dis. set)
(Pa)
PVC Duct
(Pa/m) PVC Bend (Pa/EA)
(Suc. &
Dis. set)
(Pa)
Ø160 2 6 -3.1 9.4 -
Ø200 0.8 2.3 1.2 3.7
Adaptor 5.5 + 5.5 5.8 + 5.8
PVC Duct PVC 90˚ Bend
Static pressure calculation table

14
10. Operation Range
Heat Pump Water Heater - 60 Hz (R134a)
R5TT20F-SA0

15
Heat Pump Water Heater - 60 Hz (R134a)
11. Electric Characteristics
R5TT20F-SA0
Cool Heat
R5TT20F-SA0
Unit
Type Hz Voltage
Inverter 60 208 / 240 Min : 187
Max : 276 30.1 30.0 -- 3.3 43 0.22
Compressor FM
Model
Indoor Unit
Power
MCA MOP MSC RLA W FLAVoltage Range
Note
1. Voltage range
Voltage supplied to the unit terminals should be within the minimum and maximum range.
2. Maximum allowable voltage unbalance between phase is 2 %.
3. Select wire spec. based on the larger value of MCA.
4. RLA is measured during each individual compressor test condition.
5. OFM is measured as the outdoor unit test condition.
6. Recommended circuit breaker is ELCB. (Earth Leakage Circuit Breaker)
MCA : Minimum Circuit Amperes (A)
MOP : Maximum Rating Over Current Protective Device (A)
MSC : Maximum Starting Current (A)
RLA : Rated Load Amperes (A)
FM : Fan Motor
W : Fan Motor Rated Output (W)
FLA : Full Load Amperes (A)
※ NSF372 will be certified by CSA unitl May 2021

16
Heat Pump Water Heater - 60 Hz (R134a)
12. Sound Levels (Reference Data)
12.1 Sound Pressure Level
Auto Turbo/HeatPump
R5TT20F-SA0 40 42
Model Heating
Note
‐ Sound measured at 1 m away from the unit.
‐ Data is valid at free field condition.
‐ Data is valid at nominal operation condition.
‐ Reference acoustic pressure 0dB=20μPa.
‐ Sound level will vary depending on a range of factors such as the construction(acoustic absorption coefficient) of particular room in which the equipment is
installed.
‐ The operating conditions are assumed to be standard.
‐ Sound pressure level is measured on the rated condition in the anechoic rooms by ISO 3745 standard.
‐ Sound level is measured in an anechoic room and may be different according to the test condition or equipment.

17
Heat Pump Water Heater - 60 Hz (R134a)
12. Sound Levels (Reference Data)
R5TT20F-SA0
Heating
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level ( 0 dB = 20μPa )
Octave Band Center Frequency (Hz)
▲ Turbo/HeatPump
●Auto
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold

13. Carrying Method
18
Heat Pump Water Heater - 60 Hz (R134a)
• Moving or installation of the appliance requires two or more people.
• Make sure you both have a good grip before lifting.
• Use an appliance dolly with strap to move the water heater.

19
14. Installation
Heat Pump Water Heater - 60 Hz (R134a)
SAFETY INSTRUCTIONS
WARNING
To reduce the risk of explosion, fire, death, electric shock, injury or scalding to persons,
instructions in this manual must be followed.
Be sure to fully understand the user’s manual before you install and operate this
appliance. If you have any difficultly in understanding or following the instructions in this
manual, or have any questions, contact an authorized service center or the local electric
utility.
!
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance.
Always read and follow all safety messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or injure you and others.
All safety messages will follow the safety alert symbol and either the word DANGER,
WARNING or CAUTION. These words mean:
!CAUTION
You may be slightly injured or cause damage to the product if you do not follow instructions.
!WARNING
You may be killed or seriously injured if you do not follow instructions.
!DANGER
This indicates that the failure to follow the instructions will cause serious injury or death.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance
of injury, and tell you what may happen if the instructions are not followed.
READ ALL INSTRUCTIONS BEFORE USE
!
!
!
!