Cool Energy XWH-02DHv Troubleshooting guide

HEAT PUMP WATER HEATER
USER AND SERVICE
MANUAL
Please read this manual carefully before installation & operation

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Preface
Thanks for choosing the heat pump water heater for your
domestic water heating. This manual includes the necessary
information for installation, operation and maintenance of the
Heat Pump water heater.
Please read this manual carefully before installation, operation
or maintaining the device. While installation the device, please
carry it out strictly in accordance with this manual.
Installation of the device should be performed by a suitably
qualified installer.
Please do not switch the device on until you are sure that it has
been properly installed.
The supplier or manufacturer will not be responsible for
personal injury or the unit damaged by failure to comply with
the installation and operating instruction outlined in this manual,
this will affect the warranty also.

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Content
1. Safety precaution
2. Specification
3. Function presentation
4. Installation and pipe connection
5. How to use the controller
6. Operate the heat pump water heater
7. Maintenance and repair
8. Appendix
9. Exploded diagram

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1. Safety precaution
To prevent user injury or harm from this unit, and to avoid damage to
the unit or other property, please carefully use the Heat Pump
according to this manual and understand the following information
correctly.
1.1 The heat pump must be installed by qualified personals, to avoid
improper installation which can lead to water leakage, electrical
shock or fire.
1.2 Please make sure that the unit and power connection have a good
earth wire to prevent electrical shock.
1.3 When install the unit in a small room, please take some
ventilation measures to prevent health issues caused by the leakage of
refrigerant.
1.4 The unit MUST NOT be installed near flammable gas. Any
leakage of such gas will cause fire.
1.5 Make sure that the unit is installed on a suitable and adequate
floor to avoid instability of the unit.
1.6 Earth leakage circuit breaker must be installed on the power
supply to the unit. Failure can cause electric shock or fire.
1.7 Do not place fingers or other implements into the fan and

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evaporator of the unit.
1.8 When there is something wrong or strange smell, the power
supply should be shut off to stop the unit. Continuing to run may
cause electrical short or fire.
1.9 When the heat pump needs to be moved or re-installed, please
engage a qualified person to carry out the work. Improper installation
will lead to water leakage, electrical shock, injury or fire.
1.10 The user must not repair the unit, otherwise electrical shock or
fire may occur and the warranty invalidated.
1.11 When the heat pump need to be repaired, please entrust dealer or
qualified person to carry it out. Improper movement or repair on the
unit will lead to water leakage, electrical shock, injury or fire.
1.12 The unit must be installed indoors or under adequate cover, and
the ambient temperature must be over 0 degrees C. If the unit is not to
be used for any lengthy period and the ambient temperature is below
0, please drain the water in the unit to prevent freezing and
consequent damage.
1.13 When being cleaned, shut off the power to the unit, otherwise
injury may be occurred.
1.14 Please use a suitable fuse and installed by a qualified electrician.
1.15 Do not flammable aerosols towards or around the unit, otherwise
it could cause a fire.

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2. Specs
2.1 Appearance
2.2 Dimension (mm)

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2.3 Technical Data
Models
XWH-02DHv
XWH-3.5DHv
Heating capacity A15℃/W 15 ℃- 45 ℃
Heat Output
KW
1.7KW
3.5KW
Power Consumption
KW
0.5KW
0.9KW
Typcial COP range(A15 ℃/W15 ℃-W45 ℃)
4
4
Voltage/Frequency
220-240V/50Hz
220-240V/50Hz
Rated Current
A
2.3
3.9
Fuse Current
A
6
10
Operating range
℃
-7-43
-7-43
Rated output water
temperature
℃
60
60
Condenser
copper
exchanger
copper
exchanger
Compressor type
Rotary
Rotary
Water pipe in-out
3/4"
3/4"
Diameter of air duct
connection
mm
150
150
Air Flow Rate
CFM
700
700
Noise level at 1m
dB(A)
52
53
Refrigerant
R134a/650g
R134a/1000g
Net weight
kg
49
50
Net Dimension
mm
645x645x530
645x645x530

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3. Function presentation
3.1 Heating capacity
The unit absorbs energy from the ambient air and transfer heat
to the water. If the air inlet temperature is falling, heating
capacity will be lower.
3.2 3 minutes protection
When the unit stops, if you restart the unit or turn on the manual
switch, the unit will not run for 3 minutes. This is built in
protection for the compressor.
3.3 Heating mode running
If the ambient temperature is too high, to protect the unit, the
fan motor will stop running.
3.4 Defrosting
When in heating mode, the unit will defrost automatically when
temperature is too low. The fan motor will stop running.
3.5 Working condition
The unit should be running at ambient temperatures of 0-43℃.
The unit include sophisticated electronic devices and do not fill
the heating system with water from lake, river water or ground
water.
3.6 Power off
If the power supply is off, the unit will stop running. If
operation is disturbed by lightning, power grid fluctuations or
similar, please turn the power supply off manually and then
power on again to reset.

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4. Installation
4.1 Installation diagram
4.2 Water pipe connection
Pay attention to these points when connecting the water pipe:
A. This Heat Pump Water Heater is a unit without a water tank,
only water pipes and duct pipes needed to be installed.
To protect the water tank, please make sure the pressure-release
valve is installed on the water inlet side.
B. Hot water outlet MUST BE installed after the tank is full of
water.
C. Try to reduce the water resistance in pipeline system.
D. Make sure there is nothing in the pipe and the water pipe is
smooth, check the pipe carefully to see if there is any leak, then
pack the pipe with the insulation.

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E. Install a one way valve and safety valve in the water
circulation system.
F. The water pipes may be of a rigid or flexible type. To prevent
corrosion damage, make sure that the materials used in the
piping system are compatible.
G. When installing the pipe work, any contamination of the
pipe system must be avoided(pipes may have to be flushed prior
to the connection to the unit).
4.3 Wire connection
A. There is an election cord located at the back of the unit for
power supply of the unit. The specification for the wire is
2.5mm2.
B. The power supply must be connected with an external circuit
connection.
4.4 Trial running
Inspection before trial running
A. Check the water in the tank and the water pipe connection.
B. Check the power system to make sure the power supply is
normal and the power supply connection is correct.
C. Check the unit to make sure everything is as per this
installation manual before switching on the unit.
Check the light on the wire controller when the unit runs.
Trial running
A. Use the wire controller to start the unit.
B. Listen to the unit carefully when the unit is switched on,
switch the unit off should there be any strange noises when the

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unit is running.
C. Measure the water temp.
D. The water temperature parameter has been set; the user
cannot change the parameter optionally and will need
professional support should they wish to do this.
4.5
Choose the suitable unit
For energy saving, you need to select the right according with
the correct capacity of water storage tank, water storage tank
options.
Person number
Tank capacity
2-3 persons
200L
4-5 persons
250L
More than 6 persons
300L
Notice: The above is a reference guide only.
4.6 Storage and transportation
The unit be stored and/or transported in its shipping container in
an upright position and kept dry .

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4.7Installation position
A. Waste heat is useful heat
The unit can be installed internally, say in a garage, to use the
latent heat from your other heating or reverse cycle air
conditioning. This improves efficiency during cold periods.
Ensure cold air is ducted outside.
B. Dual-use with both generation of hot water
And use of the cold discharge air for say a wine cellar or cool
room for other storage.
C. Dual use to domestic hot water and fresh air ventilation
Units can also be placed in a garage or basement and cold air
discharge for cooling areas as a gym etc.
5. How to use the controller

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5.1 Initialization
When the device is connected to the power, the controller will
appear with a full screen display and switch to standby status
after 3 seconds.
5.2 ON/OFF button
Press this button to switch standby mode to running mode. The
display will show water temperature, timer status, time and
heating sign.
Press this button to switch running mode to standby mode. The
display will show water temperature, timer status and time.
5.3 Arrow buttons “▲” and “▼”
Press these two buttons to set water temperature. Press “▲” to

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increase the temperature, “▼” to decrease the temperature.
NOTE: Press “▲” and “▼” at the same time to lock the
parameters, press “▲” and “▼” again to unlock.
5.4 “CLOCK” button
This button is for Time setting and Parameter setting.
5.5 “TIMER” button
This button is for Timer ON and Timer OFF setting.
5.6 “ELEC. HEATING” button mode selection
Press and hold “ELEC.HEATING” button for 10 seconds, you
can choose the mode. ( Economic mode [display and
], Auto mode [display and ], Rapid heating mode,
[display and ].
Press and hold “ELEC.HEATING” button for 5 seconds, it will
go to check the temperature and actual step motor of electronic
expansion valve.
A. Evaporator coil temperature
B. Ambient temperature
C. Exhaust temperature
D. Gas return temperature

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E. Actual step motor of electronic expansion valve.
6. Operate the heat pump water heater
6.1 Checking the parameters
When the unit is under running status, depress and hold in the
ELEC.HEATING button, the screen will display the user
parameter. Pressing the up and down arrows to check all
parameters from P1 to PE. Both parameter numbers and its
value are flashing. See parameter on the table. You can use both
the CLOCK+ELEC.HEATING button to check the professional
parameter.
6.2 Changing the parameters
Parameters can be changed in standby and running status. When
the unit is in standby and running status, select the parameter as
described above. Then press and holds the ELEC.HEATING
button for 5 seconds, user parameter number value will flash,
and it can be changed with up and down arrows. Press the
ELEC.HEATING again to save the change, or the new value
will be saved automatically after 5 seconds.
Press and hold the CLOCK+ELEC.HEATING button to check
the professional parameter, and the press CLOCK to change the
professional parameters.

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6.3 Setting the time
The CLOCK is a 24 hours system. Time setting can be
performed under running status. Press the CLOCK button,
hours and minutes will be both flashing. Press CLOCK again,
the hours will be flashing and can be set with up and down
arrow. Press CLOCK once more, the minutes will be flashing
and can be set with up and down arrow. Press CLOCK again to
go back the main display.
6.4 Setting the timer
Press Timer button to activate the timer setting mode, hours and
minutes will be both flashing and the display will show the ON
icon. Press timer button again, the hours will be flashing and
can be set with the up/down arrows. Press timer button again,
the minutes will start flashing and can be set with the up/down
arrows. Press Timer button again, hours and minutes will both
be flashing and the display will show the OFF icon. Timer OFF
can now be programmed in the same way. Timer setting are
programmed in memory and again available after power failure.
6.5 Cancellation of the timer
When Timer ON/OFF is activated with the relative icons on the
display, press Timer to cancel the setting.
6.6 Keypad lock and unlock

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When the unit is in running mode, pressing both arrow keys at
the same time will lock or unlock the keypad.
7. Maintenance and repair
7.1 Maintenance
A. Check the water supply and air vent frequently, to avoid
lack of water or air in the water loop. Clean the water filter
regularly to maintain water quality. Lack of water and dirty
water can damage the unit. The heat pump will start the water
pump every 72 hours when it is not running, to avoid freezing.
B. Keep the unit in a place which is dry and clean, and has
good ventilation. Clean the heat exchanger every 1 or 2 months
to maintain a good heat exchange rate and save energy.
C. Check each part of the unit and the pressure of the system.
Replace any failing part, and recharge the refrigerant if it is
necessary. Check the power supply and the electrical system to
ensure that all is in order. If any part has failed, replace it. It is
also worth checking for any unusual smells that may indicate
parts about to fail.
D. To avoid the freezing, please drain out all the water from the
lowest point of heat exchanger when it stops to run for a long
time or in Winter season. And water re-charge and full
inspection on the heat pump is needed before running.
E. Don’t put power off the unit when it is running regularly.
Otherwise, it should not be under warranty if freezing in split or

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pipeline system.
7.2 Malfunction
Protection/Malfunction
Controller
display
Malfunction light
display on PCB
standby status
T1
OFF
running status
Show designed
temperature for
5s, then show T1
ON
Low ambient temperature protection
PP0
☆☆☆☆●☆●
Inlet water temperature sensor
failure
PP1
☆●
Heating condenser sensor failure
PP3
☆☆☆●
Ambient temperature sensor failure
PP5
☆☆☆☆☆●
Exhaust sensor failure
PP6
☆☆☆☆☆☆●
Antifreeze protection in winter
PP7
☆☆☆●☆●
Protection when heating temperature
is too hot
PP8
☆●☆●
Function to prevent failure in high
temperature
HH
☆☆●☆●
High pressure protection
EE1
☆☆☆☆☆☆●
Low pressure protection
EE2
☆☆☆☆☆☆☆●
Water flow failure
EE3
☆☆☆☆☆☆☆☆●
Phase order protection
EE4
☆☆☆☆☆☆☆☆☆●

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Failure when heating temperature is
too hot
EE5
☆☆☆☆☆☆☆☆☆☆●
Exhaust over temperature three
failures
EE6
☆●☆●☆●
Defrosting
Defrosting
☆☆☆☆☆☆☆☆…
Communication failure
EE8
Available for remote
controller
When you meet the problem as above, please cut off the power
and restart the unit again or take it to maintain.

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8. Appendix
8.1 Appendix I: Parameters setting
User parameter setting and check comparison table:
Parameter
Meaning
Range
Default
Remarks
P1
Hot water temperature（℃）
15-65
55
Adjustable
P2
High-temperature sterilization
start temperature（℃）
50-75
7
P3
High-temperature sterilization
last time（M）
0-90
30
PA
Condenser temperature
℃/°F
Exact
testing by
value
Pb
Ambient temperature
℃/°F
PC
Exhaust gas temperature
℃/°F
Pd
Gas return temperature
℃/°F
PE
Actual steps of electronic
expansion valve
N*5
Profession parameter setting comparison table:
Parameter
Meaning
Range
Default
Remarks
1
Hot water temperature
compensation value
-9.9-9.9
0
2
Electronic expansion valve
20-40
25