Wellis PASRW012 Service manual

SPA HEAT PUMP UNIT
Installation & Instruction Manual

CONTENTS
1. Preface 1
2. Specifications 2
2.1 Performance Data of Spa Heat Pump Unit 2
2.2 Dimensions for Spa Heat Pump Unit 3
3. Installation and Connection 4
3.1 Installation of System 4
3.2 Spa Heat Pumps Location 5
3.3 How Close to Your Pool? 5
3.4 Spa Heat Pumps Plumbing 6
3.5 Spa Heat Pumps Electrical Wiring 7
3.6 Initial Start-up of the Unit 7
4. Usage and Operation 8
4.1 The Function of Controller 8
4.2 The controller usage 10
4.3 Parameter table 18
5. Maintenance and Inspection 19
5.1 Maintenance 19
5.2 Trouble Shooting Guide 19
6. Appendix 20
6.1 Connection of PCB Illustration 19
6.2 Connections Explanation 19
7. Appendix 20
7.1 Caution & Warning 21
7.2 Cable specification 22

CONTENTS
1. Preface 1
2. Specifications 2
2.1 Performance Data of Spa Heat Pump Unit 2
2.2 Dimensions for Spa Heat Pump Unit 3
3. Installation and Connection 4
3.1 Installation of System 4
3.2 Spa Heat Pumps Location 5
3.3 How Close to Your Pool? 5
3.4 Spa Heat Pumps Plumbing 6
3.5 Spa Heat Pumps Electrical Wiring 7
3.6 Initial Start-up of the Unit 7
4. Usage and Operation 8
4.1 The Function of Controller 8
4.2 The controller usage 10
4.3 Parameter table 18
5. Maintenance and Inspection 19
5.1 Maintenance 19
5.2 Trouble Shooting Guide 19
6. Appendix 20
6.1 Connection of PCB Illustration 19
6.2 Connections Explanation 19
7. Appendix 20
7.1 Caution & Warning 21
7.2 Cable specification 22

1
1.PREFACE
In order to provide our customers with quality, reliability and versatility, this product has been
made to strict production standards. This manual includes all the necessary information
about installation, debugging, discharging and maintenance. Please read this manual
carefully before you open or maintain the unit. The manufacture of this product will not be
held responsible if someone is injured or the unit is damaged, as a result of improper
installation, debugging, or unnecessary maintenance. It is vital that the instructions within this
manual are adhered to at all times. The unit must be installed by qualified personnel.
The unit can only be repaired by qualified installer center, personnel or an authorized
dealer.
Maintenance and operation must be carried out according to the recommended time and
frequency, as stated in this manual.
Use genuine standard spare parts only.
Failure to comply with these recommendations will invalidate the warranty.
Spa Heat Pump Unit heats the spa water and keeps the temperature constant.
This type of pump has the following characteristics:
1. Durable
The heat exchanger is made of PVC & titanium tube which can withstand prolonged
exposure to corrosives such as chlorine.
2. Installation flexibility
The unit can be installed outside or inside of the Spa.
3. Quiet operation
The unit comprises an efficient rotary/ scroll compressor and a low-noise fan motor, which
guarantees its quiet operation.
4. Advanced controlling
The unit includes micro-computer controlling, allowing all operation parameters to be set.
Operation status can be displayed on the wire controller.

1
1.PREFACE
In order to provide our customers with quality, reliability and versatility, this product has been
made to strict production standards. This manual includes all the necessary information
about installation, debugging, discharging and maintenance. Please read this manual
carefully before you open or maintain the unit. The manufacture of this product will not be
held responsible if someone is injured or the unit is damaged, as a result of improper
installation, debugging, or unnecessary maintenance. It is vital that the instructions within this
manual are adhered to at all times. The unit must be installed by qualified personnel.
The unit can only be repaired by qualified installer center, personnel or an authorized
dealer.
Maintenance and operation must be carried out according to the recommended time and
frequency, as stated in this manual.
Use genuine standard spare parts only.
Failure to comply with these recommendations will invalidate the warranty.
Spa Heat Pump Unit heats the spa water and keeps the temperature constant.
This type of pump has the following characteristics:
1. Durable
The heat exchanger is made of PVC & titanium tube which can withstand prolonged
exposure to corrosives such as chlorine.
2. Installation flexibility
The unit can be installed outside or inside of the Spa.
3. Quiet operation
The unit comprises an efficient rotary/ scroll compressor and a low-noise fan motor, which
guarantees its quiet operation.
4. Advanced controlling
The unit includes micro-computer controlling, allowing all operation parameters to be set.
Operation status can be displayed on the wire controller.
2
2.SPECIFICATION
2.1 Performance data of Swimming Pool Heat Pump Unit
*** REFRIGERANT: R410A
Unit Model PASRW012
Heat capacity kW 4.5
BTU/h 15300
Heating power input kW 1.1
Running current A5.0
Power supply 220-240V～/50Hz
Compressor quantity 1
Compressor Rotary
Fan quantity 1
Fan power input W90
Fan rotate speed RPM 850
Fan direction
Horizontal
Noise dB(A) 47
Water connection
mm
50
Water flow volume
m3/h 1.5
Water pressure drop(max)
kPa
8
Unit net dimensions(L/W/H)
mm see the drawing of the units
Unit shipping dimensions(L/W/H)
mm see package label
Net weight
kg see nameplate
Net shipping
kg see package label
Heating: Ambient temp. (DB/WB):24℃/19℃, outlet water temp: 42℃

3
2.SPECIFICATION
2.2 The dimensions for Swimming Pool Heat Pump Unit
Models: PASRW012
Water Outlet
Φ50
B
Unit: mm
Water Inlet
Φ50
A
Horizontal vision
D
Vertical vision
C
E
TYPE
SIZE
PASRW012
A
860
B
400
C
550
D
556
E
380

3
2.SPECIFICATION
2.2 The dimensions for Swimming Pool Heat Pump Unit
Models: PASRW012
Water Outlet
Φ50
B
Unit: mm
Water Inlet
Φ50
A
Horizontal vision
D
Vertical vision
C
E
TYPE
SIZE
PASRW012
A
860
B
400
C
550
D
556
E
380
4
3.INSTALLATION AND CONNECTION
3.1 Installation illustration
Valve
Water outlet
Valve
By-pass valve
Chlorinator cell
Valve
Water supply
Water inlet Sand filter
(or other type filter)
Water pump
Pool
Installation items:
The factory only provides the heat pump unit; the other items in the illustration are
necessary spare parts for the water system, provided by users or the installer.
Special Notes:
If the heat pump is used to heat the spa, then the parts will not strictly like what shown as
above, please make sure the water loop is clear and enough.
The schematic diagram is for reference only. Please check the water inlet/outlet label on the
heat pump while plumbing installation.

5
3.INSTALLATION AND CONNECTION
3.2 Spa Heat Pumps Location
The unit will perform well in any outdoor location provided that the following three factors are present
。
1. Fresh Air - 2. Electricity - 3. filter piping
DO NOT place the unit in an enclosed area with a limited air volume, where the units discharge air will
be re-circulated. DO NOT place the unit to shrubs which can block air inlet. These locations deny the
unit of a continuous source of fresh air which reduces it efficiency and may prevent adequate heat
delivery.
3.3 How Close To Your spa?
Normally, the longer the distance from the spa, the greater the heat loss from
the piping. It is recommended to install the heat pump near the spa.
Air inlet
Air outlet
500mm
6
3. INSTALLATION AND CONNECTION
3.4 Spa Heat Pumps Plumbing
The Spa Heat Pumps exclusive rated flow titanium heat exchanger requires no special
plumbing arrangements except bypass (please set the flow rate according to the nameplate).
The water pressure drop is less than 10kPa at max. Flow rate. Since there is no residual heat
or flame Temperatures, The unit does not need copper heat sink piping. PVC pipe can be run
straight into the unit.
Location: Connect the unit in the pool pump discharge (return) line downstream of all filter and
pool pumps, and upstream of any chlorinators, ozonators or chemical pumps.
Standard model have slip glue fittings which accept 40mm NB PVC pipe for connection to the
pool or spa filtration piping. By using a 50 NB to 40NB you can plumb 50NB PVC piping straight
into the unit.
Give serious consideration to adding a quick coupler fitting at the unit inlet and outlet to allow easy
draining of unit for winterizing and to provide easier access should servicing be required.
To Spa
PVC COUPLER
RECOMMENDED (Provided)
From pump
Horizontal vision
Condensation: Since the Heat pump cools down the air about 4 -5℃, water may condense on
the fins of the horseshoe shaped evaporator. If the relative humidity is very high, this could be
as much as several liters an hour. The water will run down the fins into the base pan and drain
out through the barbed plastic condensation drain fitting on the side of the base pan. This fitting is
designed to accept 3/4" clear vinyl tubing which can be pushed on by hand and run to a suitable
drain. It is easy to mistake the condensation for a water leak inside the unit.
NB: A quick way to verify that the water is condensation is to shut off the unit and keep the pool
pump running. If the water stops running out of the base pan, it is condensation. AN
EVEN QUICKER WAY IS to TEST THE DRAIN WATER FOR CHLORINE - if the is no chlorine
present, then its condensation.

5
3.INSTALLATION AND CONNECTION
3.2 Spa Heat Pumps Location
The unit will perform well in any outdoor location provided that the following three factors are present
。
1. Fresh Air - 2. Electricity - 3. filter piping
DO NOT place the unit in an enclosed area with a limited air volume, where the units discharge air will
be re-circulated. DO NOT place the unit to shrubs which can block air inlet. These locations deny the
unit of a continuous source of fresh air which reduces it efficiency and may prevent adequate heat
delivery.
3.3 How Close To Your spa?
Normally, the longer the distance from the spa, the greater the heat loss from
the piping. It is recommended to install the heat pump near the spa.
Air inlet
Air outlet
500mm
6
3. INSTALLATION AND CONNECTION
3.4 Spa Heat Pumps Plumbing
The Spa Heat Pumps exclusive rated flow titanium heat exchanger requires no special
plumbing arrangements except bypass (please set the flow rate according to the nameplate).
The water pressure drop is less than 10kPa at max. Flow rate. Since there is no residual heat
or flame Temperatures, The unit does not need copper heat sink piping. PVC pipe can be run
straight into the unit.
Location: Connect the unit in the pool pump discharge (return) line downstream of all filter and
pool pumps, and upstream of any chlorinators, ozonators or chemical pumps.
Standard model have slip glue fittings which accept 40mm NB PVC pipe for connection to the
pool or spa filtration piping. By using a 50 NB to 40NB you can plumb 50NB PVC piping straight
into the unit.
Give serious consideration to adding a quick coupler fitting at the unit inlet and outlet to allow easy
draining of unit for winterizing and to provide easier access should servicing be required.
To Spa
PVC COUPLER
RECOMMENDED (Provided)
From pump
Horizontal vision
Condensation: Since the Heat pump cools down the air about 4 -5℃, water may condense on
the fins of the horseshoe shaped evaporator. If the relative humidity is very high, this could be
as much as several liters an hour. The water will run down the fins into the base pan and drain
out through the barbed plastic condensation drain fitting on the side of the base pan. This fitting is
designed to accept 3/4" clear vinyl tubing which can be pushed on by hand and run to a suitable
drain. It is easy to mistake the condensation for a water leak inside the unit.
NB: A quick way to verify that the water is condensation is to shut off the unit and keep the pool
pump running. If the water stops running out of the base pan, it is condensation. AN
EVEN QUICKER WAY IS to TEST THE DRAIN WATER FOR CHLORINE - if the is no chlorine
present, then its condensation.

7
3.INSTALLATION AND CONNECTION
3.5 Spa Heat Pumps Electrical Wiring
NOTE: Although the unit heat exchanger is electrically isolated from the rest of the unit, it simply
prevents the flow of electricity to or from the pool water. Grounding the unit is still required to protect
you against short circuits inside the unit. Bonding is also required.
The unit has a separate molded-in junction box with a standard electrical conduit nipple already in
place. Just remove the screws and the front panel, feed your supply lines in through the conduit nipple
and wire-nut the electric supply wires to the three connections already in the junction box (four
connections if three phase). To complete electrical hookup, connect Heat Pump by electrical conduit,
UF cable or other suitable means as specified (as permitted by local electrical authorities) to a
dedicated AC power supply branch circuit equipped with the proper circuit breaker, disconnect or time
delay fuse protection.
Disconnect - A disconnect means (circuit breaker , fused or un-fused switch) should be located within
sight of and readily accessible from the unit, This is common practice on commercial and residential air
conditioners and heat pumps. It prevents remotely-energizing unattended equipment and permits
turning off power at the unit while the unit is being serviced.
3.6 Initial startup of the Unit
NOTE- In order for the unit to heat the pool or spa, the filter pump must be running to
circulate water through the heat exchanger.
Startup Procedure - After installation is completed, you should follow these steps:
1. Turn on your filter pump. Check for water leaks and verify flow to and from the pool.
2. Turn on the electrical power supply to the unit, then press the key ON/OFF of wire
controller, it should start in several seconds.
3. After running a few minutes make sure the air leaving the top(side) of the unit is cooler
(Between 5-10 ℃)
4. With the unit operating turn the filter pump off. The unit should also turn off
automatically,
5. Allow the unit and pool pump to run 24 hours per day until desired pool water
temperature is reached. When the water-in temperature reach setting, The unit just
shuts off. The unit will now automatically restart (as long as your pool pump is running)
when the pool temperature drops more than 2℃below set temperature.
Water Flow Switch - the unit is equipped with a flow switch that turns it on when the pool pump is
running and shuts it off when the pump shuts off. This switch is the same type used in all gas pool
heaters and is factory adjusted for normal pool installations. If the pool water level is more than
a few feet above or below the thermostat knob of the unit, your dealer may need to adjust it at initial
startup.
Time Delay- The unit is equipped with a 3 minute built-in solid state restart delay included to
protect control circuit components and to eliminate restart cycling and contactor chatter. This
time delay will automatically restart the unit approximately 3 minutes after each control
circuit interruption. Even a brief power interruption will activate the solid state 3 minute
restart delay and prevent the unit from starting until the 5 minute countdown is completed.
Power interruptions during the delay period will have no effect on the 3
minute countdown.
8
4. USAGE AND OPERATION
4.1. The Function of controller
Main display area
OFF
ON
F
min
SET
TEMP
IN
3 TEMP
OUT
MODE 2
SET
Aux. Display area
1 4 5
1）Button function
NO Symbol Name Function
1
On/off
Press this button can start up or shut down the unit,
cancel the current operation or back to the upper
interface
2
MODE
SET Mode Press this button can switch modes or save
parameter setting.
3
Clock
Press this button can set the clock and timer
4
Up Press this button can move up or increase
parameter value.
5
Down Press this button can move down or decrease the
parameter value.
VOL
C
A

7
3.INSTALLATION AND CONNECTION
3.5 Spa Heat Pumps Electrical Wiring
NOTE: Although the unit heat exchanger is electrically isolated from the rest of the unit, it simply
prevents the flow of electricity to or from the pool water. Grounding the unit is still required to protect
you against short circuits inside the unit. Bonding is also required.
The unit has a separate molded-in junction box with a standard electrical conduit nipple already in
place. Just remove the screws and the front panel, feed your supply lines in through the conduit nipple
and wire-nut the electric supply wires to the three connections already in the junction box (four
connections if three phase). To complete electrical hookup, connect Heat Pump by electrical conduit,
UF cable or other suitable means as specified (as permitted by local electrical authorities) to a
dedicated AC power supply branch circuit equipped with the proper circuit breaker, disconnect or time
delay fuse protection.
Disconnect - A disconnect means (circuit breaker , fused or un-fused switch) should be located within
sight of and readily accessible from the unit, This is common practice on commercial and residential air
conditioners and heat pumps. It prevents remotely-energizing unattended equipment and permits
turning off power at the unit while the unit is being serviced.
3.6 Initial startup of the Unit
NOTE- In order for the unit to heat the pool or spa, the filter pump must be running to
circulate water through the heat exchanger.
Startup Procedure - After installation is completed, you should follow these steps:
1. Turn on your filter pump. Check for water leaks and verify flow to and from the pool.
2. Turn on the electrical power supply to the unit, then press the key ON/OFF of wire
controller, it should start in several seconds.
3. After running a few minutes make sure the air leaving the top(side) of the unit is cooler
(Between 5-10 ℃)
4. With the unit operating turn the filter pump off. The unit should also turn off
automatically,
5. Allow the unit and pool pump to run 24 hours per day until desired pool water
temperature is reached. When the water-in temperature reach setting, The unit just
shuts off. The unit will now automatically restart (as long as your pool pump is running)
when the pool temperature drops more than 2℃below set temperature.
Water Flow Switch - the unit is equipped with a flow switch that turns it on when the pool pump is
running and shuts it off when the pump shuts off. This switch is the same type used in all gas pool
heaters and is factory adjusted for normal pool installations. If the pool water level is more than
a few feet above or below the thermostat knob of the unit, your dealer may need to adjust it at initial
startup.
Time Delay- The unit is equipped with a 3 minute built-in solid state restart delay included to
protect control circuit components and to eliminate restart cycling and contactor chatter. This
time delay will automatically restart the unit approximately 3 minutes after each control
circuit interruption. Even a brief power interruption will activate the solid state 3 minute
restart delay and prevent the unit from starting until the 5 minute countdown is completed.
Power interruptions during the delay period will have no effect on the 3
minute countdown.
8
4. USAGE AND OPERATION
4.1. The Function of controller
Main display area
OFF
ON
F
min
SET
TEMP
IN
3 TEMP
OUT
MODE 2
SET
Aux. Display area
1 4 5
1）Button function
NO Symbol Name Function
1
On/off
Press this button can start up or shut down the unit,
cancel the current operation or back to the upper
interface
2
MODE
SET Mode Press this button can switch modes or save
parameter setting.
3
Clock
Press this button can set the clock and timer
4
Up Press this button can move up or increase
parameter value.
5
Down Press this button can move down or decrease the
parameter value.
VOL
C
A

9
4. USAGE AND OPERATION
2）Display function
Symbol
Meaning
Function
Cooling
It is showed when the unit in cooling mode.
Heating It is showed when the unit in heating mode and flashed in
defrosting.
A
Automatic
It is showed when the unit in automatic mode.
Electric-
heating
It is showed when the unit in electric-heating mode.
(Swimming pool unit without this display）
ON Timer on It is showed when the unit sets the timer on
OFF
Timer off
It is showed when the unit sets the timer off
IN
Inlet water It is showed when the main display area gives the inlet
water temperature.(measured value)
OUT
Outlet water It is showed when the AUX display area gives the outlet
water temperature.(measured value)
TEMP Temperature It is showed when the main/ AUX display area gives
temperature
VOL
Flow It is showed when the main display area gives the water
flow value
min
Minute
It is showed when the main display area gives minute value
F
Fahrenheit It is showed when the main/AUX display area
gives Fahrenheit value
C
Centigrade It is showed when the main/AUX display area
gives centigrade value
SET Parameter
setting
It is showed when the parameter can be setted.
Lock
It is showed when the keyboard is locked.

9
4. USAGE AND OPERATION
2）Display function
Symbol
Meaning
Function
Cooling
It is showed when the unit in cooling mode.
Heating
It is showed when the unit in heating mode and flashed in
defrosting.
A
Automatic
It is showed when the unit in automatic mode.
Electric-
heating
It is showed when the unit in electric-heating mode.
(Swimming pool unit without this display）
ON
Timer on
It is showed when the unit sets the timer on
OFF
Timer off
It is showed when the unit sets the timer off
IN
Inlet water
It is showed when the main display area gives the inlet
water temperature.(measured value)
OUT
Outlet water
It is showed when the AUX display area gives the outlet
water temperature.(measured value)
TEMP
Temperature
It is showed when the main/ AUX display area gives
temperature
VOL
Flow
It is showed when the main display area gives the water
flow value
min
Minute
It is showed when the main display area gives minute value
F
Fahrenheit
It is showed when the main/AUX display area
gives Fahrenheit value
C
Centigrade
It is showed when the main/AUX display area
gives centigrade value
SET
Parameter
setting
It is showed when the parameter can be setted.
Lock
It is showed when the keyboard is locked.
10
MOD E
SET
MOD E
”
4. USAGE AND OPERATION
4.2. The controller usage
4.2.1 Starting up and shutting down
In the off interface, press" " for 0.5s can start up the unit, and aux. display-area shows
water outlet temperature; In the running interface, press" " for 0.5s can shut down the unit
and aux. display-area shows “OFF”.
Attention: the operation of Starting up and shutting down can only be done in the main interface. For
example:
Water outlet
Water inlet
temperature Water outlet
Actual Mode display temperature Actual Mode display temperature
TEMP
OUT
Off unit
4.2.2 Modes switching
MODE
SET
Press“”
for 0.5 second
can switch
between unit
on and unit off
TEMP
IN
TEMP
OUT
On unit
C
MODE
SET
If it is cold/ heat unit, in the main interface, you can switch different modes of cooling,
heating, auto mode by pressing“”.
Attention：The modes switching is useless if the unit you buy is single-cold/ single-heat unit.
For example:
A
TEMP
OUT
MODE
SET
Press“ SET ”
TEMP
OUT
MODE
SET
Press“
MOD E
SET
”
TEMP
OUT
MODE
SET
Press
“
MOD E
SET
”
TEMP
OUT
MODE
SET
Press
“
SET
MOD E
TEMP
OUT
MODE
SET

11
MODE
SET
MODE
4. USAGE AND OPERATION
4.2.3 Temperature setting
In the main interface，press“ ” or “” and the current mode target-temperature
flashes, then press“ ”to increase the temp.value, or press“
”to decrease it.
Press“”can save setting parameter and back to the main interface；
Press“”can not save setting parameter but back to the main interface；
Attention：If there is no operation for 5s，system would remember parameter setting and back
to the main interface.
For example:
Cooling target temperature
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
or“”
SET
TEMP
TEMP
OUT
C
MODE
SET
Press“”
or“”to change the value
Press “
SET
”
SET
C
TEMP
IN
TEMP
OUT
C
MODE
SET
to save value
setting
TEMP
TEMP
OUT
MODE
SET
4.2.4 Clock setting
In the main interface，press“ ” twice，Hours start to flashing ，and press“
to increase value or press“ ”to decrease value，and ”to save setting；
At the same time, minute start to flashing ，press“ ”to increase value or
” to decrease value，and press“ ”to save setting.
Press“ ”can not save setting parameter and back to main interface.
Attention：If there is no operation for 5s system will remember parameter setting and back to the
main interface.
For example：

11
MODE
SET
MODE
4. USAGE AND OPERATION
4.2.3 Temperature setting
In the main interface，press“ ” or “” and the current mode target-temperature
flashes, then press“ ”to increase the temp.value, or press“
”to decrease it.
Press“”can save setting parameter and back to the main interface；
Press“”can not save setting parameter but back to the main interface；
Attention：If there is no operation for 5s，system would remember parameter setting and back
to the main interface.
For example:
Cooling target temperature
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
or“”
SET
TEMP
TEMP
OUT
C
MODE
SET
Press“”
or“”to change the value
Press “
SET
”
SET
C
TEMP
IN
TEMP
OUT
C
MODE
SET
to save value
setting
TEMP
TEMP
OUT
MODE
SET
4.2.4 Clock setting
In the main interface，press“ ” twice，Hours start to flashing ，and press“
to increase value or press“ ”to decrease value，and ”to save setting；
At the same time, minute start to flashing ，press“ ”to increase value or
” to decrease value，and press“ ”to save setting.
Press“ ”can not save setting parameter and back to main interface.
Attention：If there is no operation for 5s system will remember parameter setting and back to the
main interface.
For example：
12
TEMP
IN
C
TEMP
MODE
OUT
SET
Press
“”
Flashing
”
TEMP
IN
C
TEMP
MODE
OUT
SET
Press
“
to save hour
value setting
”
Flashing
TEMP
IN
C
TEMP
MODE
OUT
SET
”
TEMP
IN
C
TEMP MODE
OUT
SET
Press“
”
to save minute value setting
TEMP
IN
C
TEMP
MODE
OUT
SET
4. USAGE AND OPERATION
Hour minute Flashing
Flashing
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“
or“”
Flashing
Press“
or“”
TEMP
IN
C
Press“
”
TEMP
MODE
OUT SET

13
4. USAGE AND OPERATION
4.2.5 Timer setting
In the main ”hold on 2 seconds and "on" is flashing, at this time, you
can set the timer on（means the unit timer is on），then ”again and hold on 2
seconds and "off" is flashes you can set the timer off（means the unit timer is off）.
If you want cancel the timer off, In the "off" flashing ” to cancel
Attention：1) If there is no operation for 5s，system will remember clock setting and back to the
main interface.
2) By pressing " till the "off" flashing, you can set the timer off without timer on.
Flashing
Press“”
ON
TEMP
IN
C
C
Press“
”
TEMP
IN
TEMP
OUT
MODE
SET
for 2 second
TEMP
OUT
MODE
SET
Flashing
Press
“
”
Flashing
ON
ON
TEMP
IN
C
press
“
or
“
”
”
TEMP
IN
C
TEMP
MODE
OUT
SET
TEMP
OUT
MODE
SET
Press
“
”
Flashing
Flashing
ON
ON
TEMP
IN
C
press“
or
“
”
”
TEMP
IN
C
TEMP
OUT
MODE
SET
TEMP
OUT
MODE
SET

13
4. USAGE AND OPERATION
4.2.5 Timer setting
In the main ”hold on 2 seconds and "on" is flashing, at this time, you
can set the timer on（means the unit timer is on），then ”again and hold on 2
seconds and "off" is flashes you can set the timer off（means the unit timer is off）.
If you want cancel the timer off, In the "off" flashing ” to cancel
Attention：1) If there is no operation for 5s，system will remember clock setting and back to the
main interface.
2) By pressing " till the "off" flashing, you can set the timer off without timer on.
Flashing
Press“”
ON
TEMP
IN
C
C
Press“
”
TEMP
IN
TEMP
OUT
MODE
SET
for 2 second
TEMP
OUT
MODE
SET
Flashing
Press“
” Flashing
ON
ON
TEMP
IN
C
press“
or“
”
”
TEMP
IN
C
TEMP MODE
OUT SET
TEMP
OUT
MODE
SET
Press“
”
Flashing
Flashing
ON
ON
TEMP
IN
C
press“
or“
”
”
TEMP
IN
C
TEMP
OUT
MODE
SET
TEMP
OUT
MODE
SET
14
4. USAGE AND OPERATION
Flashing
Flashing Flashing
TEMP
IN
TEMP
OUT
ON
OFF
C
MODE
SET
Press“”
TEMP
IN
TEMP
OUT
ON
OFF
C
MODE
SET
Press“”
Flashing Flashing or“”Flashing Flashing
ON ON
OFF OFF
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
or“”Flashing Flashing
ON ON
TEMP
IN
TEMP
OUT
OFF
C
MODE
SET
Press“”
TEMP
IN
TEMP
OUT
OFF
C
MODE
SET

15
ON
OFF
TEMP
IN
C
TEMP
MODE
OUT
SET
4. USAGE AND OPERATION
4.2.6 Cancel the timer setting
Press“ ”for 2s and "ON" is flashing，at this time, press ”to cancel the setting
of timer on; It is the same way to cancel the setting of timer off .
For example：
The timer on/off has been set "ON" is flashing
ON
Press“”
for 2s
TEMP
IN
TEMP
OUT
OFF
C
MODE
SET
"OFF" is flashing
Press“”
The setting of timer on has
been cancelled
OFF OFF
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
for 4s
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
The setting of timer off has
been cancelled
TEMP
IN
TEMP
OUT
C
MODE
SET
16
ick to start quiet mode
”and“ ” to turn on
MODE
SET
MODE
SET
4. USAGE AND OPERATION
4.2.7 Quiet mode timing setting
Click “
” and “ ”at the same time to start quiet mode timing setting.
Click “ ” for 2s ，“ ON ” and “ OFF ” twinklesalternately.If ON and clock`s Hours
and minutes-bit flicker together,then continous to singly ”to enter
timer-power-set(Next steps mode is the same as clock set);If OFF and clock`s Hours and
minutes-bit flicker together,then continous to singly click “ ” enter timer-power-set.
When quiet mode is on,click “ ” and “ ”at the same time to cancel it.
OFF
ON
MODE
SET
Quiet
mode on
MODE
SET
Quiet
mode off
4.2.5 A cl
Click “/off the quietmode.
MODE
SET

15
ON
OFF
TEMP
IN
C
TEMP MODE
OUT SET
4. USAGE AND OPERATION
4.2.6 Cancel the timer setting
Press“ ”for 2s and "ON" is flashing，at this time, press ”to cancel the setting
of timer on; It is the same way to cancel the setting of timer off .
For example：
The timer on/off has been set "ON" is flashing
ON
Press“”
for 2s
TEMP
IN
TEMP
OUT
OFF
C
MODE
SET
"OFF" is flashing
Press“”
The setting of timer on has
been cancelled
OFF OFF
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
for 4s
TEMP
IN
TEMP
OUT
C
MODE
SET
Press“”
The setting of timer off has
been cancelled
TEMP
IN
TEMP
OUT
C
MODE
SET
16
ick to start quiet mode
”and“ ” to turn on
MODE
SET
MODE
SET
4. USAGE AND OPERATION
4.2.7 Quiet mode timing setting
Click “
” and “ ”at the same time to start quiet mode timing setting.
Click “ ” for 2s ，“ ON ” and “ OFF ” twinklesalternately.If ON and clock`s Hours
and minutes-bit flicker together,then continous to singly ”to enter
timer-power-set(Next steps mode is the same as clock set);If OFF and clock`s Hours and
minutes-bit flicker together,then continous to singly click “ ” enter timer-power-set.
When quiet mode is on,click “ ” and “ ”at the same time to cancel it.
OFF
ON
MODE
SET
Quiet
mode on
MODE
SET
Quiet
mode off
4.2.5 A cl
Click “/off the quietmode.
MODE
SET

17
ting.
fi setting
”
and
“ ”
to turn on/of
4.USAGE AND OPERATION
4.2.8 Wi
Click “f wifi set
4.2.7 Keyboard lock
To avoid mis-operation, please lock the controller after parameter setting.
At the main interface, press“ ”for 5 seconds, the keyboard will be locked.
When the keyboard is locked, press“ ”for 5 seconds, the keyboard will be
unlocked.
NOTES: When the unit is in alarming state, the key lock can be removed automaticly.
4.2.8 Malfunction display
Locked
There will be malfunction code showing on the controller screen when relative malfunction
occurs.
You can refer to the malfunction table to find out the failure cause and solution. For
example：
MODE
SET
Water inlet temp. Sensor failure
TEMP
IN
C
Hold on
“
”
TEMP
IN
C
TEMP
OUT
MODE
SET
TEMP
OUT
MODE
SET
MODE
SET
18
4. USAGE AND OPERATION
4.3 Parameter table
Code
Meaning
Default
Remarks
r01
Set-point of cooling target temp.
27℃
Adjustable
r02
Set-point of heating target temp.
38℃
Adjustable
r03
Set-point of auto mode target temp.
27℃
Adjustable