MDV RSJ-35/300RDN3 Operating instructions

INSTALLATION & OWNER’S MANUAL
Thank you very much for purchasing our product,
Before using your unit, please read this manual carefully and keep it for future reference.
ALL IN ONE Type Air-source Heat Pump Water Heater

HOT WATER CAN BE DANGEROUS
Warning – Hot water burns. As a safety precaution, young children should always be supervised around
hot water fixtures.
Heat pump water heaters can store water at temperatures that can cause scalding. Water temperatures
over 50°C can scald and care needs to be taken to ensure that injuries do not occur through incorrect
use of your water heater.
As heat pump water heaters can generate water temperatures in excess of 60°C, regulations require
that a tempering valve be fitted to the heater to prevent water temperatures going to the home
exceeding a preset safe maximum. The tempering valve must be connected to the hot water outlet line
from the water heater. The valve must be fitted by an authorized plumber at the time of installation or in
retrofitting to existing systems.
Care should be taken to avoid coming into contact with any pipe work or fixtures associated with the
water heater pipe lines. Under NO circumstances should any ‘home handy man’ type modifications be
attempted.
• This appliance is not intended for use by persons (including children) with reduced physical sensory
or mental capabilities, or lack of experience and knowledge, that prevents them from using the
appliance safely without supervision or instruction. Children should be supervised by a responsible
person for their safety to ensure that they do not play with the appliance.
• DANGER: Failure to operate the relief valve easing gear at least once every six months may result
in the water heater exploding. Continuous leakage of water from the valve may indicate a problem
with the water heater.
• THE INSTALLATION MUST COMPLY WITH THE REQUIREMENTS OF AS/NZS 3500.4, AS/NZS 3000, and
all local codes and regulatory authority requirements. In New Zealand, the installation must conform
to the New Zealand Building Code G12.
The power supply must be protected by an individual circuit breaker at the main electrical supply
switchboard and rated to suit the booster size. The supply to the heat pump water heater can be
operated directly from the switchboard or via a remotely mounted switch or time clock as requested by
the customer. The heater must be provided with a suitable means for disconnecting the power supply.
WARNING
This unit is required reliable earthing
before usage, may otherwise result
in death or injury.
If you can't make sure that your house power supply is earthed
well, please don't install the unit.
The unit must be installed by a licensed tradesperson and in
accordance with ：
• Midea installation instructions.
• AS/NZS 3500.4-"National Plumbing and Drainage Code Hot
Water Supply Systems-Acceptable Solutions".
• AS/NZS 3000-Wiring Rules.
• Local authority regulations.
• Buliding Codes of Australia
• Local Occupational Health and Satety (OH&S) Regulations.
This water heater must be installed by a licensed person as required by the Building Act. Only a
licensed person will give you a compliance certificate, showing that the work complies with all the
relevant standards and only a licensed person will have insurance protecting their workmanship for
6 years.
NOTICE TO CUSTOMERS
Please read and understand this booklet.If you have any questions , please contact our service
representative on 1300 367 565.

PARTS’ NAMES
NOTE
All the picture in this manual are for explanation purpose only. They may be slightly different from the heat pump water heater you
purchased (depanding on model). Please refer to the real product instead of the picture of this manual.
Water-proof Shield to be purchased by the client, not along with the product accessories.
When ordering repair parts please always give the following information:
1) Model, serial and product number.
2) Parts name.
Front Cover
Electronic Control Box
Compressor
Display
Cover
Front Decorative Board
Cover
(Electric
Heater)
T CO
Electric Heater
ATCO
PTR valve
W ater Outlet
Rear Cover
Junction Box
Junction
Box Cover
Top Cover
Fan Assy
Evaporator Filter
Water-proof
Shield Water-proof Shield
Water Inlet
Anode
Drain Pipe
Anode
Anode

1
Installation & Owner's Manual
CONTENTS PAGE
1
1
2
4
8
11
14
16
17
18
BASIC OPERATION PRINCIPLE..............................................................
SAFETY INFORMATION..........................................................................
BEFORE INSTALLATION.........................................................................
INSTALLATION......................................................................................
TRIAL-RUNNING....................................................................................
OPERATION ..........................................................................................
TROUBLE SHOOTING.............................................................................
MAINTENANCE......................................................................................
SPECIFICATIONS...................................................................................
MIDEA– HEAT PUMP MANUFACTURER’S WARRANTY..........................
W ARNING
1. SAFETY INFORMATION
Please read thoroughly all of the instrucitons before installing or
operating the unit.
The following safety warnings are very important, always read and
obey all safety symbols:
● The unit must be earthed effectively.
● A RCD breaker must be installed adjacent to the power supply.
● Do not remove, cover or deface any permanent instructions,
lables, or the data label from either the outside of the unit or
inside of unit panels.
● Only qualified persons should perform the installation of this unit
in accordance with local national regulations and this manual.
Improper installation may result in water leakage, electric shock
or fire.
● Ask qualified person for relocating, repairing and maintaining the
unit.
Improper installation may result in water leakage, electric shock
or fire.
● Electric connection work should comply with the instructions of
local power company, local electric utility and this manual.
● Never use an incorrectly fuse rated, otherwise the unit may break
down and risk of electrical fire.
● Do not insert fingers, rods or other objects into the air inlet
or outlet. The fan is rotating at high speed, and may cause injury.
● Never use a flammable spray such as hair spray, lacquer paint
near the unit. It may cause a fire.
● This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance
by a person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance.
NOTE
Above calculations are based on ideal conditions, the final
amount will be different the actual running will vary with
conditions, such as running period, ambient temperature, etc.
0 1 2 3 4 5 6 7 8 9 10 11 12 13
HPWH
Gas Burner
E-heater
Running Cost AUD
Fig.1-1
0. BASIC OPERATION PRINCIPLE
We know from experience, the natural flow of heat, moves from a
higher to a lower temperature source, a heat pump can transfer heat
from a lower temperature source to a higher temperature source with
high efficiency.
The advantage of a heat pump water heater is that it can supply more
heat energy, normally 3:1 times than input electricity power by extract-
ing the heat from ambient atmosphere in a free charge way and
transfer to Sanitary Hot Water. Compared to a traditional water heater,
such as electric water heater or gas burner water heater, their
efficiency is normally less than 1:1, which means you can dramatically
cut off the bill of family daily SHW by the application of heat pump
water heater, the following examples will show more details.
Power consumption comparison under the same condition to heat 1
ton of water from 15˚C to 55˚C.
The equivalent heat load Q=CM(T1-T2)=1(kCal/kg*)X1000(kg)
X(55-15)(℃)=40000kCal=46.67kW*h
Table 0-1
HPW H Gas Burner E-heater
Energy
Resourc
e
Air,Electricity Gas Electricity
Transfer Factor 860kCal/kW*h 8905kCal/m
³860kCal/kW*
h
Average
Efficienc
y
(W/W)
3.5 0.8 0.95
Unit Cost 0.25 AUD/kW*h 1.7C/MJ 0.25 AUD/kW
*
h
Running Co
s
t
AUD 12.28 3.57 3.33
13.33kW*h 210MJ 49.13 kW*
h
Energy
Consumptio
n

2
Installation & Owner's Manual
Prevent water from
flowing backwards
2.1 Unpacking
2.1.1 Accessories
2. BEFORE INSTALLATION
T able . 2-1
1
Accessory Name Qty. Sharp Purpose
Owner’s & Installation
Manual
Installation and use instruction
This manual
1
One Way Valve
Drain condensate water
1
1
Adaptor
2.2 Location requirements
2.1.2 How to transport
Enough space for installation and maintenance shall be
preserved.
The air inlet and outlet should be free from obstacles and strong
wind.
The base surface should be flat, surface should be inclined no
more than 2° and able to bear the weight of the unit and
suitable for installing the unit without increasing noise or
vibration.
The operation noise and air flow expelled shall not affect
neighbors.
No flammable gas is leaked nearby.
It is convenient for piping and wiring.
If it is installed in indoor space, it might cause indoor
temperature decrease and noise, please take preventive
measures for this.
If the unit has to be installed on a metal part of building, make
sure the well electric insulation which should meet the relevant
local electric standard.
1)
1)
2)
2)
3)
4)
5)
6)
7)
8)
In order to avoid scratch or deformation of the
unit surface, apply guard boards to the
contacting surface.No contact of fingers and
other things with the vanes. Don’t incline the
unit more than 75° in moving, and keep it
vertical when installing.
This unit is heavy, it need to be carried by
two or more persons, othewise might cause injury and damage.
>75°
Gradient limit>75°
The ambient air temperature must also be considered when
installing this unit, in heat pump mode the ambient air
temperature must be above -7℃ and below 43℃.If the ambient
air temperature falls outside these upper and lower limits,the
electrical elements will activate to meet the hot water demand
and the heat pump will not operate.
The unit should be located in an area not subject to freezing
CAUTION
Must be installed.
Separately package.
Install at the air inlet port
2
Water-proof
Shield
Filter screen
● If the supply cord is damaged, it must be replaced by the
manufacturer or its service agent or a similarly qualified person.
● DISPOSAL: Do not dispose this product as
unsorted municipal waste. Collection of such
waste separately for special treatment is
necessary. Do not dispose of electrical
appliances as unsorted municipal waste, use
separate collection facilities. Contact your local
government for information regarding the
collection systems available.
● If electrical appliances are disposed of in landfills or dumps,
hazardous substances can leak into the groundwater and get
into the food chain, damaging your health and well-being.
CAUTION
● The earthing pole of socket must be well grounded, make sure
that power supply socket and plug are dry and connected tightly.
● Before cleaning, be sure to stop the operation and turn the
breaker off or pull out the power plug. Otherwise, an electric
shock and injury may be caused.
● Water temperature over 50℃ can
cause severe burns instantly or
death from scalds. Children,
disabled and elderly are at
highest risk of being scalded.
Feel water before bathing or
showering. Water temperature
limiting valves are required as
per AS 3500.
● Do not operate the unit with a wet hand. An electric shock may
be caused.
● The installation height of power supply should be over 1.8m, if
there is any water exposure, steps must be taken to separate
the power supply from water.
● A one-way valve must be installed on the water inlet side, as
well as an isolation value.
● It is normal for some water to be released from the PTR valve
during operation. But, if there is a large volume of water, call
your service agent for instructions. After long term use, check
the unit base and fittings. If damaged, the unit may sink, resulting
in injury. Arrange the drain pipe to ensure smooth draining.
Improper drainage work may cause wetting of the building,
furniture etc. Do not touch the inner parts of the controller or
remove the front panel. Some parts inside are dangerous to
touch, and damage may be caused.
● Do not turn off the power supply.
System will stop or restart heating automatically. A continuous
power supply for water heating is necessary, except service
and maintenance.
Hydrogen gas is extremely flammable, and may build up if no
water is drawn of for several weeks. To reduce the risk of
injury under these conditions, it is recommended that the hot
water tap is opened for several minutes at the kitchen sink
before using any electrical appliance connected to the hot
water system. When hydrogen is present, there will probably
be an unusual sound such as air escaping through the pipe as
the water begins to flow. There should be no smoking or open
flame near the tap at the time it is open.
NOTE: Water-proof Shield to be purchased by the client, not
along with the product accessories.

3
Installation & Owner's Manual
2.3 Maintenance space requirements (unit: mm)
2.5 Unit outline dimension (unit: mm)
2.4 If installed in inclosed space
The water heater must be located in a space >15m³, and must have
unrestricted air flow. As an example, a room that has a 2.5 tall ceiling
and is 3 meter long by 2 meter wide would contain 15m³ .
Fig.2-3
Φ650
Φ342
Φ188.5
Fig.2-2
temperatures. The unit located in unconditioned spaces(i.e.,
garages, basements, etc.) may require the water piping,
condensate piping, and drain piping to be insulated to shelter
against freezing.
CAUTION
WARNING
The unit must be securely fixed, otherwise, noise and vibration
may result.
Make sure that there are no obstacle around the unit.
In places where there are strong wind like seaside, fix the unit in
a location protected from the wind.
Installing the unit in any of the following places may lead to
malfunction(If it is inevitable, consult the supplier prior to purchase).
The site contains mineral oils such as lubricant of cutting
machines.
Seaside or where the air contains salt.
Hot spring area where corrosive gases exist, e.g., sulfide gas.
Factories where the power voltage fluctuates seriously.
Inside a car or cabin.
The place with direct sunlight and other heat supplies. If there’s
no way to avoid these, please install a cover.
Places like kitchen where oil may permeate system.
Place where strong electromagnetic fieids exist.
Place where flammable gases or materials exist.
Place where acidic or alkaline gases exist.
Other special environments.
Fig.2-1
Display
Air
outlet
Barrier
≥600
650
≥600 ≥600
Air
inlet
≥600 ≥600
650

4
Installation & Owner's Manual
3. INSTALLATION
The circulating air for every unit should be more than 350m3/h. Make sure there is enough Installation space. Refer outline dimensional
drawing(See Fig.2-3).
3.1 Water System Piping
1)
Water inlet or outlet pipes: The spec of the water inlet or outlet thread
is RC3/4” (external thread). Pipes must be heat-resistant and durable.
Installation of the pipe for PTR valve: The valve connecting thread
is RC3/4” (internal thread). After installation, it must be confirmed
that the drainpipe outlet is exposed in the air.
W ARNING
● Do not dismantle the PTR valve,
● Do not block off the drainage pipe, it will cause explosion
and injury. EXPLOSION
CAUTION
Handle
Drainage
pipe
Piping water system as the above figure. In case of installing
where outside temperature falls below freezing point,
insulation must be provided for all hydraulic components.
The PTR valve should be checked every half year
to make sure that there is no restriction of the valve.
Please beware of hot water from the valve.
The drainage pipe should be well insulated
in order to prevent water inside pipe from
freezing in cold weather.
2)
3)
4)
5)
Installation of the One Way Valve: The One Way Valve thread is
RC3/4”. It is used to prevent water from flowing backwards.
After connection of the water system piping work, turn on the
cold water inlet valve and hot water outlet valve and bleed all air
from the tank. When water flows smoothly out from water outlet
pipe(tap water outlet), the tank is full, turn off all valves and
check pipeline to make sure there is no any leakage.
If the inlet water pressure is less than 0.15MPa, a pump should
be installed at the water inlet.
To guarantee the safety usage of tank, a reducing valve should
be installed in the water inlet pipe, if the water pressure exceeds
0.65MPa.
Condensate may be leaked from unit if drainage pipe is blocked,
or unit operates in high humidity environment, a drainage pan is
recommanded as shown as following figure:
Fig.3-1
Water Outlet
User
water Inlet
anode
Drainpipe
T ap W ater
Ball V alve
One W ay V alve
Barrel-drain
ExpansionTank for pressure relief
(recommended)
PTR valve
Upper
Condensate Outlet
Lower
Condensate Outlet
Notice:
The tempering valve is
required on the hot water
usage terminal.
Fig.3-2
50mm larger than
the dia. of unit
Max.22mm Heat Pump
Water Heater
anode
anode

5
Installation & Owner's Manual
3.2 Water-proof shield installation
Air inlet and outlet with water-proof shield.
NOTE
When water-proof shield is installed condensate will be gener-
ated around the outside of water-proof shield.
For your safety, please do not take off the front decorated rate.
Fig.3-3
1)
Filter needs to be installed at the air inlet position. (Fig.3-5)
2)
Fig.3-4
W ARNING
When outdoor installation is required two separate water-proof
shields must be installed, otherwise it may cause short-circuit
and electric shock because of water ingress. (Fig.3-3)
In case of rain entering to internal components of the unit, the
component might be damaged or causing physical danger.
(Fig.3-4)
Air inletAir outlet
Unit
Rain Rain
Weather shed To smoothly drain condensate from unit, please install the main unit
on a horizontal floor. Otherwise, please ensuring the drain vent is
at the lowest level. Recommended inclination angle of unit to the
ground should be no more than 2°.(Fig.3-6)
3)
Fig.3-5
Filter
inletoulet
Fig.3-6
Drain
Drain

Installation & Owner's Manual
6
3.3.2 Specifications of Power Supply
Fig.3-7
3.3.1 Electric Wiring Illustration
T3: Evaporator Temp. Sensor
T4: Ambient T emp. Sensor
T5U: T ank T emp. Sensor (upper)
TP: Discharge Temp. Sensor
Earthing
T5L: T ank T emp. Sensor (lower)
TH: Suction Temp. Sensor
WARNING
The unit must be installed with an RCD
near the power
supply and must be e f fectively
earthed.
Please choose the power cord according to above table, and
make sure it comply with local electric standard.
Recommended power cord mode is H05RN-F.
CAUTION
3.3 Electric Connection
The power supply should be hard wired.
Power supply circuit should be earthed effectively.
The wiring must be performed by professional technicians in
accordance with national wiring regulations and the circuit
diagram below.
An all-pole disconnection device which has at least 3mm
separation distance in all pole and a residual current device
(RCD)with the rating of above 10mA shall be incorporated in
the fixed wiring according to the national rule.
Set the electric leakage protector according to the relevant
electric technical standards of the state.
The power cord and the signal cord shall be laid out neatly
and properly without mutual interference or contact the
connection pipe or valve.
After wire connection, check it again and make sure of
connection before power is turned on.
T able . 3-2
4
40 / 30
30 m A
≤
0 . 1 s e c
C r eepage B r ea k e r
E a r t h cord ( mm
2
)
M anua l S w i t c h ( A ) C ap c i t y / F u s e ( A )
M ode l N a m e
P o w e r S upp l y
M i n . D i a m e t e r o f P o w e r
S upp l y cord ( mm
2
)
220-240V ～ 50Hz
RSJ-35/300RDN3
4
2 M K 1 M K
y l p p u s r e w o P
n e e r g / w o l l e Y
y t i c a p a c n a F
m e t I t n e t n o C
e s a b l a n i m r e T
r e m r o f s n a r T
k n a t e h t f o e d i s n i s e r i w d e t c e n n o C
r o t c u d n i l a u t u m C A
r o t c u d n i l a u t u m y t i c i r t c e l e e s a h p - o r e Z
g u l p t t u B
g u l p t t u B
s e r i w g n i t c e n n o c y a l e R
y a l e R
h c t i w s e v i t c e t o r p e r u t a r e p m e T
k n a t e h t f o r e t a e h c i r t c e l e r e p p U
e s a b l a n i m r e t d i M
h c t i w s y r e v o c e r e r u t a r e p m e t c i t a m o t u A
y t i c a p a c n a F
l e n a p l o r t n o c n i a M
y a r G e t i h W
n e e r g / w o l l e Y
h g u o r h t t e g h c i h w , s e r i w N , L e h T
l a u t u m y t i c i r t c e l e e s a h p - o r e z e h t
e m a s e h t g n i p e e k t s u m , r o t c u d n i
, e s i w r e h t o , g n i r w g n i r u d n o i t c e r i d
. d e s u a c y a m n o i t c n u f l a m m e t s y s
. t n e n o p m o c g n i d n o p s e r r o c e h t h t i w t c e n n o c t s u m , k n a t m o r f t u o s e m o c e r i w F 1 C 1 - A 1
n w o r B n w o r B n w o r B n w o r B
e t i h W
d e R
e u l B
n e e r g / w o l l e Y
e u l B
r o s s e r p m o C
r o s s e r p m o C
y t i c a p a C
e d i s n i k n a t f o m a r g a i d g n i r i W
k c a l B
d e R
e u l B
e u l B
d e R
E U P M O C
n w o r B
k c a l B
d e R
D C L
5 N C
e t i h W
4 2 N C
8 1 N C
k c a l B
U 5 T
4 T 3 T
L 5 T
P T
H - O R P
w o l l e Y
0 2 N C 9 1 N C 6 1 N C
6 N C
8 2 N C
1 N C
0 4 N C 7 2 N C
) s g n i t t e s y r o t c a f e h t r e t l a o t w o l l a r e v e n r e s U ( n o i t c e l e s l e d o M
t c e f n i s i D h t i W
l e d o m L 0 9 1
r o s n e s e r u t a r e p m e t n o i t c u S
r o s n e s e r u t a r e p m e t t n e i b m A
4 T
r o s n e s e r u t a r e p m e t r o t a r o p a v E
3 T
) r e p p U ( r o s n e s e r u t a r e p m e t k n a T U 5 T
) r e w o L ( r o s n e s e r u t a r e p m e t k n a T
L 5 T
r o s n e s e r u t a r e p m e t e g r a h c s i D
P T
H T
t c e f n i s i D t u o h t i W
r e t a e H c i r t c e l E h t i W
r e t a e H c i r t c e l E t u o h t i W
l e d o m L 0 0 3
H T
h c t i w S n o i t c e t o r P e r u s s e r P h g i H
H - O R P
n w o r B e u l B
e u l B
e u l B
d e R
k c a l B
d e R
d e R
e u l B
) s g n i t t e s y r o t c a f e h t r e t l a o t w o l l a r e v e n r e s U ( n o i t c e l e s l e d o M
z H 0 6 - y c n e u q e r f r e w o P
, s l i o c y g r e n e r a l o s e h t l l a t s n i o t s d e e n m o t s u c e h t f I
h t i w d e t c e n n o c e b o t s d e e n l a n i m r e t 6 2 N C e h t n e h t
e h t s e i l p p u s 2 N C e h T . y l p p u s r e w o p V 0 4 2 ~ 0 2 2 e h t
, p m u p r e t a w y g r e n e r a l o s e h t r o f l a n g i s l o r t n o c
, r o t c a t n o c C A e h t y b d e l l o r t n o c e b t s u m p m u p r e t a w e h t d n a
. y l t c e r i d p m u p r e t a w e h t e v i r d t o n d l u o h s l a n i m r e t 2 N C e h t s a
. d o h t e m g n i r i w r o f s n a i c i n h c e t r o t u b i r t s i d t c a t n o c e s a e l P
6 2 N C
2 N C
z H 0 5 - y c n e u q e r f r e w o P
r o t c a t n o C C A

7
Installation & Owner's Manual
3.3.3 PCB I/O Ports description
Fig.3-8
NOTE
3.4.1 Location
The flooring beneath the water heater must be able to
support the weight of the unit when filled with water (more
than 445kg).
Located indoors (such as a basement or garage) and in a
vertical position. Sheltered from freezing temperatures.
Provisions made to shelter the area from water damage.
Metal drain pan installed and piped to an adequate drain.
Sufficient room to service the water heater.
Sufficient air for the heat pump to function,
the water heater must be located in a space >15m³, and
must have unrestricted air flow.
For optimal efficiency and serviceability, the following clearances
should be maintained: 800mm on the air inlet side, 800mm on the
air outlet side, 600mm in the back, and 600mm in the front.
3.4 Installation checklist
3.3.4 Switch setting
PCB has 2 bits of switches.
3.3.5 Electric leakage protector
SW1
S W 1
_
1
S W 1
_
2
ON OFF
Model selection (User never allow to alter the factory settings)
Without Electric Heater With Electric Heater
Without Disinfect With Disinfect
Table.3-4
SW2
S W 2
_
1
S W 2
_
2
ON OFF
Model selection (User never allow to alter the factory settings)
300L model 190L model
Table.3-5
Fig.3-9
L
N
GND
Power Cable
RCD
Power frequency-60Hz Power frequency-50Hz
The unit cannot be placed into any type of closet or small
enclosure.
The site location must be free from any corrosive elements
in the atmosphere such as sulfur, fluorine, and chlorine.
These elements are found in aerosol sprays, detergents,
bleaches, cleaning solvents, air fresheners, paint, and
Solar Pump
(300L)
Alarm
SW1 Factory Setting
for Disinfect
&Electric Heater
Model Selection
SW2 Factory Setting
for 190L/300L Model
Selection
High Pressure
Switch
Tp:Comp
Discharge
Temp.Sensor
Transformer
Output
Transformer
Input
Power Supply
Solar Input
(300L)
Fan COMP 4-way
Valve
EHEAT S.V. Crank
Heater
Panel Display
Power Supply
Output
Panel Display
Output
T5L:Lower
Tank Water
Temp.Sensor
T5U:Upper
Tank Water
Temp.Sensor
T4:Ambient
Temp.Sensor
T3:Evaporator
Inlet Temp.
Sensor
Th:Comp
Suction
Temp.Sensor
EEV

8
Installation & Owner's Manual
4.1 Water affusion before operation
Before using this unit, please follow the steps below.
Water Affusion: If the unit is used for the first time or used again after
emptying the tank, please make sure that the tank is full of water
before turning on the power.Method: see Fig.4-1
Water Affusion
Hot water outlet
Close
Water out
When water flows out from the water outlet,
the tank is full. Turn off the hot water outlet
valve and water affusion is finished.
Open
Open the cool water inlet valve and the hot
water outlet valve.
Cool water inlet Hot water outlet
Open
Fig.4-1
3.4.4 Electrical Connections
varnish removers, refrigerants, and many other
commercial and household products. In addition excessive
dust and may affect the operation of the unit and require
frequent cleaning.
The ambient air temperature must be above -7ºC and
below 43ºC.If the ambient air temperature falls outside
these upper and lower limits the electrical elements will be
activated to meet the hot water demand.
3.4.2 Water System Piping
PRT(Temperature and pressure relief valve) properly
installed with a discharge pipe run to an adequate drain
and sheltered from freezing.
All piping properly installed and free of leaks.
Unit completely filled with water.
Tempering valve installed per manufacturer’s instructions.
3.4.3 Condensate Drain Line Installation
Must be located with access to an adequate drain or
condensate pump.
Condensate drain lines installed and piped to an adequate
drain or condensate pump.
The water heater requires 230 VAC for proper operation.
Wiring size and connections comply with all local applicable
codes and the requirements of this manual.
Water heater and electrical supply are properly grounded.
Correctly sized overload fuse or circuit breaker protection
installed.
3.4.5 Post Installation Review
Understand how to use the User Interface Module to set the
various modes and functions.
Understand the importance of routine inspection/maintenance
of the condensate drain pan and lines. This is to help
prevent any possible drain line blockage resulting in the
condensate drain pan overflowing.
IMPORTANT: Water coming from the plastic shroud is an
indicator that both condensation drain lines may be blocked.
Immediate action is required.
To maintain optimal operation check, remove and clean the
air filter.
Fig.4-2
Emptying
Drainpipe shut-off valve
Close
After emptying, please replace the nut of
drainpipe.
Close
Open
Drainpipe shut-off valve
Open
Cool water inlet
Close the cool water inlet valve, open the hot
water outlet valve and open drainpipe.
Hot water outlet
CAUTION
After powered on, the display lights up. Users can operate
the unit through the buttons under the display.
Emptying: If the unit needs cleaning, moving etc, the tank
should be emptied. Method: See Fig.4-2:
Operation without water in water
tank may result in the damage of
auxiliary E-heater. In case of such
damage, the manufacturer will not
be liable for any damages caused
by this issue.
4. TRIAL-RUNNING

9
Installation & Owner's Manual
Defrosting During Water-heating
In heat pump running period, if the evaporator frosted in lower
ambient temperature, the system will defrost automatically to
keep effective performance(about 3~10min). At defrosting time,
the fan motor will stop, but compressor will still run.
COP
COP varies at different ambient temperature. Normally lower
ambient temperature result in longer heat-up time because of
lower effective performance.
If only use E-heater, about 150 liters water will be heated, so set
higher target water temperature if ambient temperature is out of
heat pump running range.
NOTE
E-heater will be activated once for the current heating progress,
if want to apply E-heater again, please by push .
Restart After a Long Term Stop
When the unit is restarted after a long term stop(trail running
included), it is normal that outlet water is unclean. Turn the tap on
and the water will be flushed clean.
About TCO (Thermal-cutoff) and ATCO (Automatical
thermal-cutoff)
The power of E-heater will be automatically shut-off or turn on by
TCO and ATCO.
When ambient temp below 2℃, heat pump and E-heater will
take different portions of heating capacity, generally the lower
of ambient temperature, the lower portion of heat pump will
contribute as well as the higher portion of E-heater will provide
more detail please refer to Table.4-1.
If the water temperature is higher than 78℃, the ATCO will
automatically shut off the power of E-heater, and turn back on
when the temperature falls down below 68℃.
If the water temperature is higher than 85℃, the TCO will
automatically shut off the power of compressor and E-heater.
After that it needs to be reset manually.
Modes will be automatically selected by unit. Mode can not be
selected by manual operation.
Running Temperature Range
Setting water temperature target range: 38~60ºC.
E-heater running ambient temperature range: -20~43ºC.
Heat pump running ambient temperature range: -7~43ºC.
Water temperature limits:
3)
4.2 Trial- running
Checking list before trial-running.
Correct installation of the system.
Correct connection of water/air piping and wiring.
Condensate draining smoothly well insulation work for all
hydraulic part.
Correct power supply.
No air in the water pipeline and all valves opened.
Effective RCD installed.
Sufficient inlet water pressure (between 0.15MPa and 0.65MPa) .
4.2.1 Checking list before commisionning.
1)
2)
3)
4)
5)
6)
7)
8)
4.2.2 About Running
System Structure Figure
Unit has two kinds of heat sources: Heat pump(compressor)
and electric heater.
The unit will automatically select heat sources to heat water to
the target temperature.
1)
Water Temperature Display
The temperature shown on the display depends on the upper
sensor. It is normal that the display temperature has reached to
target temperature but compressor still running, because the
lower water temperature does not meet to target temperature.
2)
Tank
Temperature sensor(T5U)
Electric heater
Water inlet
Water outlet
Fig.4-3
Heat Source Shift
The default heating source is heat pump.
If ambient temperature range is out of heat pump operating
range, heat pump will stop running, the unit will shift
automatically to activate E-heater and show the icon LA( ) on
4)
display, then if the ambient temperature goes into the running
range of heat pump again, it will stop E-heater and shift
automatically to heat pump again, and the icon LA( ) will be
extinguished.
If the target setting water temperature is higher than Maximum
temperature(Heat pump), the unit will activate heat pump firstly
to the Maximum temperature, then stop heat pump, activate
E-heater to continually heat water to the target temperature.
If manually activate the E-heater running when heat pump
running, E-heater and heat pump will work together until the
water temperature gets to target temperature. So to increase
recovery rate, please manually activate E-heater.
Temperature sensor(T5L)
T4 ＜ -7
60 60 60 60 60 60
60 47 55 42
-- --
-7≤T4 ＜ -2
RSJ-35/300RDN3
-2≤T4 ＜ 2 2≤T4 ＜ 7
Ambient
temp.(T4)
Model
Max.Temp.
(Heat pump)
Max. Temp.
(E-heater)
Table.4-1
7≤T4 ＜ 43 T4≥43

For the convenience of maintenance and debug, query function is
available by Press 2 buttons together: ” + , then
system running parameters will be shown one by one with following
sequence by each pushing of or button.
10
Installation & Owner's Manual
Fig.4-4
Fig.4-5
Fig.4-6
NOTE
While the ambient temperature below than -7℃, heat pump
efficiency will decrease dramatically, the unit will automatically
shift to E-heater running.
4.2.3 Basic function
Weekly disinfect function
unit disinfection unit immediately starts to heat water up to 65℃ to
kill the potential legionella bacteria inside water of tank,“ ”icon
will lighted on the display screen during disinfection; unit will quit
disinfection if water temperature is higher than 65℃ and
extinguish “ ”icon.
Vacation function
After pressing "Vaction" button, Unit will automatically heat water
to 15℃ for the purpose of energy saving during vacation days.
How is the unit running
If unit is OFF->press ->unit will be unlocked->press
to set target water temperature(38-60℃)->press ->unit
will automatically select heat source and start to heat water to
target temperature.
ON/O F F
1)
2)
3)
4.2.4 Query function
Table.4-2
No.
Hour
low bit
Min.
high bit
Min.
Low bit
Temp./
Dasys
Explenation
11 Software number
6 Temp. Th
5 Temp. TP
4 Temp. T4
3 Temp. T3
8 Last error code
9 Previous 1st error or
protection code
10 Previous 2nd t error or
protection code
7 Current Compressor
1 Temp. T5U
2 Temp. T5L
1000
1500
2000
2500
3000
3500
4000
4500
-25 -15 -5 5 15 25 35 45
Ambient temperature(℃)
Capacity within Different Temperature
15 - 45
℃
15 - 50
℃
15 - 55
℃
15 - 60
℃
0
1
2
3
4
5
6
7
8
9
-25 -15 -5 5 15 25 35 45
Ambient temperature(℃)
Heat Up Time within Different Temperature
15 - 45
℃
15 - 50
℃
15 - 55
℃
15 - 60
℃
0.00
1.00
2.00
3.00
4.00
5.00
6.00
-25 -15 -5 5 15 25 35 45
Ambient temperature(℃)
COP within Different Temperature
15 - 45
℃
15 - 50
℃
15 - 55
℃
15 - 60 ℃

11
Installation & Owner's Manual
5. OPERATION
5.1 Control Panel Explanation
5.2 Display Explanation
Fig.5-1
Display
Operation
Fig.5-2
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
⑩
1 1
1 5 1 2 1 6 1 3
14.1 14.2
1
2
3
4
5
6
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SET
DAY
Invalid
SET CLOCK
ON
OFF
ON
OFF
VA CATI ON CAN CE L
CLO CK
TI MER
ENTER
P r e s s 3 s e c o n d s
f o r l o c k / u n l o c k
DI SINF ECT
1
2
3
4
5
6
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SET
DAY
Invalid
SET CLOCK
ON
OFF
ON
OFF
ON/ OF F
②
①
No Icon Description
③
④
Table.5-1
Wire controller:
If a wire controller is connected, will be
lightened; otherwise be extinguished.
Outside solar heat source:
If an outside solar heat source has been
connected to the unit, will flash with 0.5Hz
frequency; otherwise will be extinguished.
Vacation :
will be lightened if the unit is under vacation,
otherwise will be extinguished;
will flash with 2Hz frequency when setting
vacation.
Compressor:
will be lightened when compressor is
running, otherwise will be extinguished.
⑥
⑤
No Icon Description
⑦
⑧
E-heater:
will be lightened if E-heater is activated,
otherwise will be extinguished.
If E-heater is automatically activated by unit,
will be lightened;
If E-heater is manually activated, will flash
with 0.5Hz frequency.
When setting E-heater manually ON/OFF,
will flash with 2 Hz frequency.
Disinfect:
will be lightened when the unit is under disinfect
function, otherwise will be extinguished.
will be lightened if disinfect function is automati-
cally activated by unit;
will flash with 0.5Hz frequency, if disinfect function
is manually activated;
will flash with 2Hz frequency when setting
disinfect function or setting disinfect timer.
High temp. Alarm
If setting water temp. is higher than 50℃，
will be lightened, otherwise will be
extinguished.
Alarm:
When unit is under protection/error, will flash
with 5Hz frequency as well as buzzer will sound
3 times every 1 minute until protection/error
eliminated or press for 1 second.
Lock:
If button is locked, will be lightened,
otherwise will be extinguished.
Temperature unit
If setting temperature unit as celsius, will be
lightened, will show celsius degree;
If setting temperature unit as Fahrenheit, will be
lightened, will show Fahrenheit degree.
Press for 10sec, it will change between
and .
If button is under lock mode, press any button
except unlock button, will be lightened;
will be lightened when setting water
temperature or setting days for vacation.
will be lightened when setting days for
vacation;
will be lightened when on vacation.
Setting
Date setting
⑨
⑩
1 1
1 2
14.1
14.2
Invalid
Invalid
Invalid
will be lightened if screen is unlocked.
It shows water temperature on normal;
It shows remaining vacation days on vacation;
It shows setting temperature under setting;
It shows unit setting/running parameters,
error/protection code under querying.
:
Reserved
1 3

12
Installation & Owner's Manual
1 2
No Icon Description
1 5
1 6
Timer
There are six timers available.
If anyone of them has been set,
will lighten the corresponding one when
screen is unlocked；
If there is none of timers has been set, it the
icon will keep extinguished.
If timer is being set, will flash the
corresponding one with 2Hz frequency and
lighten the timer which has been set.
Clock and clock setting
shows the clock.
Whenever there is any setting for clock,
will be lightened.
No. Icon Description
Manually turn E-heater ON
If E-heater is OFF, follow these steps below to
manually turn it on.
If E-heater is already ON, Press will lead
to show invalid icon on the display.
Long pressing the E-heater key for 10s then can
shift to set the temperature display unit from "F" to
"C" or from "C" to "F". The default is "C" (when it's
shifted to display "F", it still will display "C" while it
operates spot check).
INCREASE
If screen is unlocked, corresponding value will
increase by pushing .
● When setting temperature, press more
than 1s, Temperature value will be increased
continuously;
● When Setting clock/timer, press more
than 1s, Clock/timer value will be increased
continuously;
● When setting vacation days, press more
than 1s, day value will be increased continu-
ously;
On querying, check items will page up by
pressing .
1
2
Only in unlocked state, pressing the button is functional.
Icon will flash.
Confirm manually turning E-heater on,
then E-heater is activated to heat up water
to the target temperature. If it needs
manually turn E-heater on again, it has to
repeat these steps.
Invalid
No Icon Description
Set Clock
3.1
3.2
Set the hour value of clock.
Confirm the hour setting. Then the minute
value of clock will flash slowly.
Set the minute value of clock.
Confirm the minute setting and quit clock
setting.
Press button for 3 sec to enter clock
setting. Then icon will be
lightened and the hour value of clock will
flash slowly.
Set Timer
Set the hour value of timer.
Set the minute value of timer.
Set the action(ON or OFF) of the timer.
Set the water temperature of the setting timer.
Confirm the action(ON or OFF) of the timer.
Enter timer setting.
Select timer( ~ ) to be set. The timer
icon will flash slowly if it is selected .
Confirm the selected setting timer.
Then will be lightened. Then
the hour value of timer will flash slowly.
Confirm the hour value of timer. Then the
minute value of timer will flash slowly.
Confirm and complete the timer. Then
repeat this process to set another timer.
Confirm the minute value of timer. Then
ON or OFF icon following the setting
timer will flash slowly.
ON/OFF
ON
OFF
The display screen will automatically
display different value at by
different action. It will display the last set
temperature and icon if the action is
ON, or will display if the action is
OFF.
Table.5-2
Fig.5-3
① ③
④⑨
⑦ ⑥ ⑤
②
⑧
SET
SET CLOCK

13
Installation & Owner's Manual
No Icon Description
Cancel Timer
Check Timer
3.2
DECREASE/DOWN
If screen is unlocked, corresponding value will
decrease by pushing .
● When setting temperature, press more
than 1s, temperature value will be decreased
continuously;
● When Setting clock/timer, press more than
1s, Clock/timer value will be decreased continu-
ously;
● When setting vacation days, press more
than 1s, day value will be decreased continuously;
On querying, check items will page down by
pressing .
If there is confliction between Timer and Manually
ON:
1) The moment of Manually ON has priority;
2) The moment of timer OFF has priority;
4
5
6
Enter timer setting.
Select timer( ~ ) which needs to be
cancel.The timer icon will flash slowly if it
is selected.
Select time ( ~ ) to be checked. The
timer icon will flash slowly if it is selected,
and the timer action(ON or OFF) and set
clock will be shown. If the action is ON,
target temperature will be shown. And if
the action is OFF, icon will be
shown.
Press button for 3sec or no button
pressing for 30sec to quit timer checking.
Confirm to cancel the timer. Then repeat
selecting timer and cancelling. If the timer
has not been set, when press button
the display will show . After complete
cancelling timer, press button for 3sec
to quit timer cancelling.
CANCEL
To cancel setting, quit setting, clear alarm, ect.
To clear alarm buzzer, need to press it for 1sec.
ON/OFF button and LED indicator
If unit is standby, press , then unit will be OFF.
If unit is ON, press , then unit will be OFF.
If unit is OFF, press , then unit will be ON.
LED indicator will be lightened if unit is ON or
standby and extinguished if unit is OFF.
Invalid
Icon Description
DISINFECT
8
NoNo
9
Icon will flash.
Set the hour value of clock.
Set the minute value of clock.
Set vacation days. The days range is 1~99
days(default as 14 days).
Confirm vacation setting and quit out. The
unit will immediately go into vacation.
Confirm the disinfect clock setting and
quit out.
Confirm manually activate disinfection
function , then the unit will heat up water to
65 ℃ at least for disinfection.
CONFIRM/UNLOCK
If screen and buttons are unlocked, press it to
confirm setting parameters after setting any
parameter:
● If press it within 10sec, setting parameters will be
confirmed;
● If press it longer than 10sec, please reset all
parameters.
If screen and buttons are locked, press it for 3s to
unlock them.
Manually turn on disinfect function
Disinfect Clock Setting
7
Confirm the hour setting. Then the minute
value of clock will flash slowly.
Unit will automatically start disinfect function at the
above-set clock every 7 days.
If user don't set disinfect clock, unit will automatically
start disinfect function at 23:00 every 7 days.
If unit is OFF or under disinfect function, press
will lead to show on the display.
VACATION
Vacation Setting
Enter vacation setting. Icon will
flash. Icon will be lightened. will
show the last setting vacation days.
Press button for 3sec to enter
disinfect clock setting. Then icon will
flash, and icon will be lightened
and the hour value of clock will flash slowly.
SET CLOCK
DAY

In vacation period, the setting target water
temperature is 15℃ as default and will show
the remanent vacation days. On the last day of
vacation, unit will automatically start disinfect
function, and automatically reset the target
temperature to the last one before vacation.
If unit has already been in vacation or OFF, press
w will lead to show invalid icon on the
display.
14
Installation & Owner's Manual
5.3 Combination button
5.4 Auto-restart
5.5 Button Auto Lock
Icon DescriptionNo
No. Icon Description
Clear
error
code
Query
+
Press the two buttons at
the same time to clear
all stored error & protect
codes, and the buzzer
will buzz one time.
Press the two buttons at
the same time for 1sec to
go into querying. Under
querying user can check
unit setting & running
parameters by pressing
circularly. Press
button for 1s or no button
operation for 30s,
then quit querying.
If electricity power failed, unit can memorize all setting parameters,
unit will be back to the previous setting when power recover.
When there is no operation of button for 1 minute, button will be
locked except Unlock button , Press for 3s, unlock
buttons.
5.6 Screen Auto Lock
If there is no operation of button for 30s, screen will be locked(extinguished)
except for error code and alarm light.
Press any button will unlock the screen(lighten).
9
+
6.2 Something about self-protection of unit
6.3 When Error happened
When the self-protection activates, the system will be stopped
and start a self-check, and restart when the error is resolved.
When the self-protection activates, the buzzer will buzz every
second minute, the will flash and error code will be shown at
water temperature indicator. Press button for 1sec to stop
buzz, but the and error code does not disappear until the error
is resolved.
In the following circumstance, self-protection may happen:
If air inlet or outlet is blocked;
If the evaporator is covered with too much dust;
Incorrect power supply(exceeding the range of 220-240V).
Q: Why is the temperature shown on the display sometimes
decreased but unit still keep off?
A: To avoid unit ON/OFF frequently, unit will activate heat source only
when bottom tank temperature is lower than setting temperature
for at least 5 ºC.
Q:Why is the temperature shown on the display sometimes will
decrease dramatically?
A: It is because tank is pressure-bearable type, if there is massive hot
water demand, hot water will quickly tapped out from upper part of
tank at the same time cold water will quickly tapped into bottom
part of bank.The cold water flows to the upper temperature sensor,
the temperature shown on the display will decreased dramatically.
Q: Why is the temperature shown on the display sometime decrease
a lot, but there is still a mount of hot water can be tapped?
A: This is because the upper water sensor is located on the upper 1/4
tank, when tapping hot water out, it means there is at least 1/4 tank
of hot water available.
Q: Why is unit shown the icon "LA" on display ?
A: The heat pump available running ambient range is from -7 to 43℃,if
ambient temperature is out of the range, system will show
above-mentioned signal to let user notice it.
Q: Why is there nothing shown on the display?
A: To maintain display screen lifespan within along term, when there
is no button operation for 30 sec, it will extinguwish the display
except the LED indicator.
Q: Why are the buttons unavailable sometimes?
A: If there is no operation on panel for 1 min, unit will lock the panel,
shows " ", to unlock the panel, please press the "ENTEF" button
for 3 seconds.
Q: Why is there some water flowed from drainage pipe of PTR valve?
A: It is because the tank is pressure-bearable one, when water is
heated inside the tank, it will expand. So the pressure inside of
tank will increase. If pressure goes up more than 1.0MPa, PTR
valve will activate to release the pressure and discharge hot water
correspondingly. If water is continually discharged from PTR valve
drainage pipe, it is abnormal. Please contact authorised technician
to check.
6. TROUBLE SHOOTING
6.1 Non-error tips
Q: Why can't compressor start immediately after setting?
A: Unit will wait for 3 min to balance the pressure of system before
start compressor again, it's a self protection logic of unit.
Q: Why is the temperature shown on the display panel sometimes
decreased while unit is running?
A: When the upper tank temperature is much higher than the bottom
part, upper part hot water will be mixed by the bottom cold water
which flows from inlet tap water, so that will decrease the upper
part temperature.
1)
2)
3)
If some cases at error happen, unit will automatically shift to
E-heater for emergent SHW supply, please contact authorised
technician staff to repair.
If case of serious errors the unit will not start, please contact
authorised technician to repair.
If some errors, the buzzer will buzz 3 times every minute and the
will flash fast. Press for 1 sec to stop the buzzer but
the alarm icon will keep flashing.
1)
2)
3)

15
Installation & Owner's Manual
Table.6-1
Table.6-2
6.4 Error phenomenon shooting
Error
phenomenon Possible reason solution
Cold water
out and
display screen
extinguished
No hot water
out
Water leakage
Hydraulic pipeline joints
are not sealed well.
Bad connection between power supply plug
and socket;
Setting water temperature too low;
Temper sensor broken ;
PCB of indicator broken ;
Compressor broken.
Plug in;
Setting water temp. higher;
Contact service center.
Waiting for public water supply recover;
Waiting for inlet water pressure increase;
Open water inlet valve.
Check and reseal all joints.
Public water supply ceased;
Cold water inlet pressure too low (<0.15 MPa);
Cold water inlet valve closed.
Malfunction Description Corrective action Display
Error of sensor T5U(upper water temperature sensor) E0
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
Error of sensor T5L(lower water temperature sensor) E1
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
Tank and Wired Controller communication error E2 Maybe the connection between controller and PCB is broken
or PCB has been broken.
Evaporator temperature sensor T3 error E4
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
ambient temperature sensor T4 error E5
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
Compressor discharge temperature sensor TP error E6
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
E8
Electric leakage error
If PCB current_induction_circuit check the current
difference between L,N >14mA, system consider it as
"electric leakage error"
Maybe some wires have been broken or bad wire
connection.
Contact a qualified person to service the unit.
Compressor suction temperature sensor TH error E9
Maybe the connection between sensor and PCB is broken
or sensor has been broken.
Contact a qualified person to service the unit.
EE E-heater open-circuit error( IEH(Current difference
E-heater on & E-heater off )<1A)
Maybe the E-heater has been broken or bad wire
connection after repair.
Clock chip error EF
Maybe the chip has been broken, but unit can work well
without clock-menmory, so it is needed to reset clock
when power put on again.
If necessary, contact a qualified person to service the
unit.
6.5 Error code shooting table
E-EPROM chip error Contact a qualified person to service the unit.
Ed
P1 System high pressure protection
≥
3.0MPa active ；≤ 2.4MPa inactive
System blocked, air or water or more refrigerant
in system(after repair), water temperature
sensor malfunction, ect.
Contact a qualified person to service the unit.

Installation & Owner’s Manual
16
7. MAINTENANCE
1)
2)
3)
4)
5)
6)
7)
Check the connection between power supply plug and socket
and ground wiring regularly;
In some cold area (below 0℃), if the system will be stopped for
a long time, all the water should be released in case of freezing
of inner tank and damage of E-heater.
It is recommended to clean the inner tank and E-heater every
half year to keep an efficient performance.
Check the anode every half year and change if required. For
more details, please contact the supplier or the after-sale
service.
It is recommended to set a lower temperature to decrease the
heat release, prevent scale and save energy if the outlet water
volume is sufficient.
Clean the air filter every month in case of any inefficiency on the
heating performance.
In terms of the filter set in air inlet directly (namely, air inlet
without connect with canvas), the method of dismantle the filter
is: anti-clockwise unscrew the air inlet ring, take out the filter
and clean it completely, finally, remount it to the unit.
Before shutting the system off for a long time, please:
Shut off the power supply;
Release all the water in water tank and the pipeline and close
all the valves;
Check the inner components regularly.
How to change the anode;
Turn off the power, and turn off the water inlet valve.
Open hot water tap, and decrease the pressure of the inner
container.
7.1 Maintenance
8)
P2
High discharge temperature protection
Tp>110℃,Protection active
Tp<90℃，Protection inactive
P3
P4
LA
It is normal, and no necessary to repair.
7.2 Recommended regular maintenance table
Open the drain port, and release the water, until there are no water
flow out.
Unscrew anode according to instruction.
Replace with a new one, and make sure effective sealed.
Open cold water valve untill water flows out from outlet tap,
then turn of water outlet tap.
Power on then restart the unit.
Checkin
g
Item
Checkin
g
conten
t
Checking frequency Action
1 air filte
r
(inlet/outle
t
)
every month Clean the filte
r
2 anode every half year Replace it if it h
a
s
been used ou
t
3 inner tank every half year Clean the tan
k
4
5
E-heater every half year Clean E-heater
Operate the
hander of PTR
valve to ensure
that waterways
are clear.
PTR valve
If water doesn't flow freely when operating the
hander, replace PTR valve with a new one
every year
Table.7-1
Fig.7-1
anode
For the bad mining area environment and poor water quality, it
must periodic do the following works base on the actual
situations: check the magnesium bar to see whether it has been
consumed; clean the sundries in the filter screen to prevent
blocking the air inlet; clean the filter screen.
Compressor abnormally stopped protection.The discharge
temperature is not so higher than evaporator temperature
after compressor running a term.
Compressor overloaded protection (10 secs after compres-
sor startup, current checking starts, 1) only compressor
running, if it is >10A , the compressor will be stopped and
protected. 2) Compressor+E-heater running, if it is
>IEH+10,the compressor will be stopped and protected.)
When the ambient temp T4 is out of Heat Pump running
range (-7～43℃) Heat Pump will stop, unit will show LA on
the position of clock on display until T4 back to (-7～43℃).
Only valid for the unit without E-heater.Unit with E-heater
will never show "LA".
System blocked, air or water or less
refrigerant(leakage) in system( after repair), water temperature
sensor malfunction, ect. Contact a qualified person to service the unit.
Compressor broken or bad connection between PCB and
compressor.Contact a qualified person to service the unit.
Maybe because of compressor broken, system blocked, air or water
or more refrigerant in system(after repair),water temperature sensor
malfunction, ect. Contact a qualified person to service the unit.
The diagnostic codes listed above are the most common. If a
diagnostic code not listed above is displayed, contact residen-
tial technical assistance referenceing the number on the front
of this manual.
If any of P3/P4/P2/P1 continuously appear 3 times within single
heating cycle, system will consider it as “Heat Pump system error”. The
third failure code and will be shown on the display, then heat pump
will stop running,and the unit will shift automatically to E-heater as the
backup heat source,but the third failure code and will be shown until
power is reset.Contact a qualified person to service the unit.
NOTE

17
Installation & Owner's Manual
8. SPECIFICATIONS
Model
Rated power/AMPS
Power supply 220-240V~ 50Hz
Auto/Manual startup, error alarm, timer, etc
R134a(1200g)
Operation control
Protection
E-heater power
Refrigerant
Outlet water temp.
Water side exchanger
Inlet pipe Dia.
Outlet pipe Dia.
Material
Motor power
Air circulation way
Net weight
Safety condenser,copper tube
wrapped around outside of storage tank
Hydrophilic aluminum fin, inner groove copper tube
80W
Φ650×1920mm
3000W
Max. pressure 1.0MPa
Water tank cap.
Water-heating cap. 3000W
4300W/18.7A
Drain pipe Dia.
DN20
DN20
DN20
PTR valve Dia. DN20
300L
Dimension
Default 60°C, (38-60°C adjustable ）
RSJ-35/300RDN3
Table. 8-1
144.5kg
T30A 250VAC
Fusible link type
The test conditions:
Ambient temperature 15/12°C(DB/WB),
Water temperature from 15°C up to 45°C.
High-pressure Protector, Over-load Protector,
Temp Controller&Protector, etc
Outlet/inlet vertically, water-proof installation available