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  9. LG APHWC501M User manual

LG APHWC501M User manual

P/NO.: MFL71409304_Rev00. 09152023
Copyright © 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
Heat Pump Water Heater
SERVICE MANUAL
MODEL : APHWC501M(R5TT50F-SA1), APHWC801M(R5TT80F-SA1)
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or
transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from
which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-2-
•Meanings of symbols used in this manual are as shown below.
Cautions in Repair
WARNING
!
Do not turn on the breaker or power under condition that front panel, rear
panel, top cover, or control box cover is removed or opened. Otherwise, it
may cause fire, electric shock, explosion or death.
Be sure to disconnect the power to unit before disassembling the equipment
for a repair .Internal components and circuit boards are at main potential
when the equipment is connected to the power. This high voltage is extremely
dangerous and may cause death or severe injury if come in contact with it.
Do not touch the discharging refrigerant gas during the repair work. The
discharging refrigerant gas. The refrigerant gas can cause frostbite.
Release the refrigerant gas completely at a well-ventilated place first.
Otherwise, when the pipe is disconnected, refrigerant gas or refrigerating
machine oil discharges and it can cause injury.
When the refrigerant gas leaks during work, perform ventilation. If the
refrigerant gas comes in contact with a fire, poisonous gas generates. A
case of leakage of the refrigerant and the closed room full with gas is
dangerous because a shortage of oxygen occurs. Be sure to perform
ventilation.
When removing the front panel or cabinet, execute short-circuit and discharge
between high voltage capacitor terminals. If discharge is not executed, an
electric shock is caused by high voltage resulting in a death or injury.
Do not use a defective or underrated circuit breaker. Use the correctly
rated breaker and fuse. Otherwise there is a risk of fire or electric shock.
Install the panel and the cover of control box securely. Otherwise there is risk
of fire or electric shock due to dust, water etc.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage to properties only.
!
!
To prevent injury to the user or other people and property damage, the following
instructions must be followed.
•Incorrect operation due to ignoring instruction will cause harm or damage. The
seriousness is classified by the following indications.
SAFETY PRECAUTIONS
Be sure not to do.
Be sure to follow the instruction.
Dangerous Voltage.
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-3-
WARNING
!
Wiring connections must be secured tightly and the cable should be
routed properly so that there is no force pulling the cable from the
connection terminals. Improper or loose connections can cause heat
generation or fire.
Do not touch, operate, or repair the product with wet hands. Otherwise
there is risk of electric shock or fire.
CAUTION
!
Do not turn on the breaker when the front panel and cabinet are removed.
Be sure to ground the water heater with an earthing conductor connected
to the earthing terminal.
Conduct repair works after checking that the refrigerating cycle section
has cooled down sufficiently. Otherwise, working on the unit, the hot
refrigerating cycle section can cause burns.
Do not tilt the unit while removing panels. Otherwise, the water inside the
unit can spill and wet floor.
Do not use the welder in a well-ventilated place. Using the welder in an
enclosed room can cause oxygen deficiency.
Be sure to turn off power switch before connecting or disconnecting
connector, or parts damage may be occur.
CAUTION
!
Check to see if the parts are mounted correctly and wires are connected.
Improper installation and connections can cause an electric shock or an
injury.
Check whether the installation platform or frame has corroded. Corroded
installation platform or frame can cause the unit to fall, resulting in injury.
Be sure to check whether the earth wire is correctly connected.
After the work has finished, be sure to do an insulation test to check
whether the resistance is 2[Mohm] or more between the charge section
and the non-charge metal section (Earth position). If the resistance value
is low, a disaster such as a leak or electric shock is caused at user’s side.
Check the drainage of the indoor unit after the repair. If drainage is faulty
the water may enter the room and wet floor.
WARNING
!
Check to see if the power cable is not dirty or loose. If the cable is dusty
or loose it can cause an electrical shock or fire.
Do not use a joined power cable or extension cable, or share the same
power outlet with other electrical appliances. otherwise, it can cause an
electrical shock, excessive heat generation or fire.
Do not insert hands or other objects through the air inlet or outlet while
the product is operating. There are sharp and moving parts that could
cause personal injury.
Do not block the inlet or outlet of air flow. It may cause product failure.
Inspections after Repair
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-4-
NOMENCLATURE
Factory Model Name
Buyer Model Name
No. Signification
1, 2 Heat Pump Water Heater for R134a
3Classification
- T : Packaged
4Compressor Type
- T : Inverter Heating Only
5,6 Water Tank Capacity
- e.g. 50gal →“50”
8Outdoor Unit Platform
- “-” : Packaged(No Outdoor Unit)
9Look/Color
- S : Frontier Silver
10 Function
No. Signification
1Refrigerant
- A: R134A
2Component
- P : Packaged
3Product Category
- H: Heating
4Product Type
- W : Tank Water
5Product Grade
- C : Standard Efficiency
6, 7 Nominal Capacity
- e.g. 50gal →“50”
8 Generation
9Features
- M : Mid Temp. Water
Model
No.
1 2 3 4 5 6 7 8 9 10 11
Refrigerant Series
No
123456789
R134A
Water
Heater R 5 T T 5 0 F - S A 1
7Water Tank Capacity
- F : Frontier
- A : Smart Function + Hybrid Mode
11 Serial No.
- LG Model Development Serial No.
1A P H W C 5 0 1 M
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-5-
PRODUCT SPECIFICATIONS
Model APHWC501M APHWC801M
Capacity
Volume(Norminal) Gal 58 80
L220 303
Volume(Rated) Gal 53 72
L201 273
UEF(Draw Pattern Medium) - - -
UEF(Draw Pattern High) - 3.93 3.90
FHR Gal 76 94
Annual Energy Consumption kWh 1262 1272
Power Input Upper Element Wattage(208V / 240V) kW 3.8 / 5.0 3.8 / 5.0
Lower Element Wattage(208V / 240V) kW 3.8 / 5.0 3.8 / 5.0
Energy Star - Yes Yes
Power Supply Ø, V, Hz 1Φ,208/240V,60Hz 1Φ,208/240V,60Hz
Available Voltage Range V 176~276 176~276
Air Flow Rate Rated CFM 155.4 155.4
Sound Pressure Level Auto dB(A) 42 42
Turbo/Heat Pump dB(A) 45 45
Dimensions Net(W x H x D) in. 22-27/32 x 63-31/32 x 22-29/32 22-27/32 x 79-1/16 x 22-29/32
Shipping(W x H x D) in. 29-1/16 x 69-7/8 x 27-5/32 29-1/16 x 84-31/32 x 27-5/32
Weight Net lb. 220 262
Shipping lb. 260
304
Operation Range Heating °F DB 23 ~ 120 23 ~ 120
Ex terior Color -Lux ury Silver Lux ury Silver
Compressor
Type - Twin Rotary Twin Rotary
Model - EST092MBA EST092MBA
Motor Type - BLDC BLDC
Locked Rotor Ampere(LRA) A N/A(Inverter) N/A(Inverter)
Oil Type - POE
PVE
POE
PVE
Oil Charge cc 220 220
Rated Load Ampere(208V / 240V) A 3.3 / 3.1 3.3 / 3.1
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-6-
Model APHWC501M APHWC801M
Fan
Type Propeller Fan Propeller Fan
Motor Type BLDC BLDC
Motor Output 43 43
Full Load Ampere(FLA) 0.22 0.22
Heat Ex changer(Evaporator)
Quantity - 1 1
Rows - 3 3
Columns - 15 15
FPI - 21 21
Design Pressure(System) High Side psi 290 290
Low Side psi 130.5 130.5
Max Working Pressure(Water Tank) psi 150 150
Minimum Circuit Ampacity A 30.1 30.1
Max ium Circuit Breaker Heat Pump & Heater A 30 30
Wiring Connections Power Supply Cable(included Earth) AWG x cores 10 x 3C 10 x 3C
Drain Hose Size I.D in. 3/4, 1/2 3/4, 1/2
Refrigerant
Type - R134a R134a
Pre Charge oz. 23 26
Additional Charge oz./ft. - -
Control - Electronic Ex pansion Valve Electronic Ex pansion Valve
Defrost Method - Reverse Cycle Reverse Cycle
Anode - Sacrificial Sacrificial
Foam Insulation inch 1.6 ~ 2.4 1.6 ~ 2.4
T&P Relief Valve - Yes Yes
Water Connection Location - Side Side
Water Connection Size inch 3/4 3/4
Digital Display - Yes Yes
Wi-Fi - Yes Yes
-
-
-
-
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-7-
PIPING DIAGRAM
M
Compressor
Heating
Defrosting
Th1
Th4
Th5 Th3
Th2
Th6
Water Tank
EEV
Heat
Exchanger
(Condenser) Heat
Exchanger
(Evaporator)
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.
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-8-
WIRING DIAGRAM
APHWC501M / APHWC801M
P/No.: MEZ68504006 Rev.: 00_100523
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-9-
CN_DISP1
CN_TANK_D
CN_DISP2
CN_TANK_U
RY_HEATER1_L
CN_COM2
CN_REMO
CN_HEATER2_CT
CN_WL
CN_LINK
RY_HEATER1_N
RY_HEATER2_L
RY_HEATER2_N
CN_IN_N1
CN_OUT_N1
CN_L1
RY_COMP
CN1
CN_TOUCH
CN_TEMP_AIR
CN_HEATER1_CT
CN_FLOAT
CN_WIFI
POWER PCB INVERTER PCB
CN_UVW
CN_COIL2 CN3
CN_COIL1
CN2
CN_FAN
CN_LGMV
CN_TH1
CN_TH2
CN_EEV
CN_4WAY
APHWC501M / APHWC801M
137211
HNMP13
2687D
159830 2687M
W4810
354210
549990
352115
35211E
W1NF
559014
550140
237205
135515 135510
546710
349600
661401552116
55211G
2687P
263SZZ
263DZZ
263RVZ 2687U
135500Z
778600
554160
249951
330871
HNVC13
352116
266010
LOC. Heat Exchanger
352410
Quanity
Rows
Columns
FPI
1
3
15
21
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-11-
DISASSEMBLY
Before the following disassembly, disconnect all power to the heater and shut off the water supply to the heater.
1. Top cover and Front panel
• Remove the 6 screws that fasten the top cover. (See Figure 1)
• Remove the top cover.
• Remove the front décor. (There are 4 hooks.)
• Remove the 4 screws that fasten the front panel. (See Figure 2)
• Lift the front panel out. (Lift right side first.)
• Disconnect the connector between the front panel and control box.
• Re-install the components by referring to the removal procedure, above.
2. Rear panel
• Remove the top cover and front panel. (Refer to section 1)
• Remove the 2 screws that fasten the rear panel at both sides.
• Remove the 2 screws that fasten the rear panel at back.
• Lift the rear panel out. (See Figure 3)
• Re-install the components by referring to the removal procedure, above.
3. Control box
• Remove the top cover and front panel. (Refer to section 1)
• Remove the 1 screw that fasten the control box cover.
• Remove the control box cover. (There are 3 hooks.) (See Figure 4)
• Re-install the components by referring to the removal procedure, above.
4. Motor and Fan
• Remove the top cover, front panel, and rear panel. (Refer to section 1, 2)
• Remove the 2 screws that fasten the bracket. (See Figure 5)
• Remove the bracket.
• Remove the 4 screws that fasten the motor bracket.
• Lift out the motor bracket, motor, and fan. (See Figure 6)
• Remove the 2 screws and the nut that secure the motor and fan.
• Separate the motor bracket, motor, and fan.
• Re-install the components by referring to the removal procedure, above.
(Figure 1) (Figure 2)
(Figure 3) (Figure 4)
(Figure 5) (Figure 6)
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only training and service purposes.
-12-
5. Shroud
• Remove the fan. (Refer to section 4)
• Remove the 6 screws that fasten the shroud.
• Remove the shroud. (See Figure 7)
• Re-install the components by referring to the removal procedure, above.
6. Heating Elements
• Drain the water heater to a level just below the element to be replaced.
• Remove the front décor. (There is 4 hooks.)
• Remove 2 screws that fasten the element cover.
• Remove the element cover. (See Figure 8)
• Mark, then disconnect the wires from the element by removing the 2 screws.
• Using socket wrench, remove the element.
• Re-install the components by referring to the removal procedure, above.
7. ECO
• Drain the water heater to a level just below the upper element
• Remove the front decor. (There is 4 hooks.)
• Remove 2 screws that fasten the upper element cover. (See Figure 8)
• Remove the upper element cover.
• Mark, then disconnect the wires from the ECO by removing the 4 screws.
• Remove 2 nuts that fasten the ECO.
• Remove the ECO.
• Re-install the components by referring to the removal procedure, above.
(Figure 7)
(Figure 8)

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