evoheat Evo315-C User manual

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Evo315-C Hot Water Heat Pump Manual
Contents
1. Introduction ____________________________________________________________________________________________ 2
2. Unit Specifications _______________________________________________________________________________________ 3
2.1 How it Works ________________________________________________________________________________________ 3
2.2 Dimensions _________________________________________________________________________________________ 3
2.3 Technical Data _______________________________________________________________________________________ 4
2.4 System Diagram______________________________________________________________________________________ 4
3. Safety Instructions _______________________________________________________________________________________ 5
4. Installation _____________________________________________________________________________________________ 6
4.1 Pipeline Connection __________________________________________________________________________________ 6
4.2 Handling & Transportation _____________________________________________________________________________ 7
4.3 Location of Install & Minimum Clearances_________________________________________________________________ 7
4.3.1 Indoor Installation Recommendations ________________________________________________________________ 8
4.4 Cable Connection ____________________________________________________________________________________ 9
4.5 Filling the Tank ______________________________________________________________________________________ 9
4.6 Initial Start-up of the Unit ______________________________________________________________________________ 9
5. Operation _____________________________________________________________________________________________ 10
5.1 Main Controller Interface _____________________________________________________________________________ 10
5.2 Functions of the Controller ____________________________________________________________________________ 11
5.2.1 Turning the Unit ON & OFF ________________________________________________________________________ 11
5.2.2 Mode Selection _________________________________________________________________________________ 11
5.2.3 Target Temperature Checking & Setting______________________________________________________________ 12
5.2.4 Hydro Boost Setting______________________________________________________________________________ 12
5.2.5 Setting the Time and Date_________________________________________________________________________ 13
5.2.6 Setting the Timer ________________________________________________________________________________ 14
5.2.7 Cancelling the Timer _____________________________________________________________________________ 15
5.2.8 Vacation Mode__________________________________________________________________________________ 15
5.2.9 Keyboard Locking________________________________________________________________________________ 16
5.2.10 Force Defrosting _______________________________________________________________________________ 16
5.2.11 Fan/Ventilation Function_________________________________________________________________________ 16
6. Troubleshooting________________________________________________________________________________________ 17
6.1 Parameters Explained ________________________________________________________________________________ 17
6.2 Error Codes ________________________________________________________________________________________ 19
7. Appendix _____________________________________________________________________________________________ 20
7.1 Wiring Diagram & PCB Board __________________________________________________________________________ 20
7.2 Exploded Parts View _________________________________________________________________________________ 22
7.3 Earthing Methodology _______________________________________________________________________________ 23
7.4 Use of the P&T Valve_________________________________________________________________________________ 23
7.5 Using the Overheating Protector _______________________________________________________________________ 23
7.6 Draining the Water Tank______________________________________________________________________________ 23
8. Maintenance __________________________________________________________________________________________ 24
9. Warranty _____________________________________________________________________________________________ 25

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Evo315-C Hot Water Heat Pump Manual
1. Introduction
This manual contains all the necessary information in regard to the installation, troubleshooting, operation and
maintenance of this unit. Ensure instructions in this manual are adhered to at all times. Failing to comply with these
recommendations will invalidate the warranty. This manual and all others are available for download on our website.
- When installing the Evo315-C, follow all instructions as documented in this manual.
- Once the installation is complete, check that all connections are secure before the power is turned on.
- The installer is to explain to the end user how to operate and maintain the unit in accordance with this
instruction manual.
- Evo Industries Australia Pty Ltd will not be held responsible for any damages or injuries caused by the
incorrect installation of this hot water system.
- A maintenance programme must be carried out as recommended in this manual to ensure ongoing
reliability.
- Failure to comply with these recommendations could void the warranty and cause injury or death.
- Due to continuous product improvement, this manual may be subject to change without prior notice.

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Evo315-C Hot Water Heat Pump Manual
2. Unit Specifications
2.1 How it Works
-Refrigerant is compressed into vapor with high temperature and high pressure when it goes through the
compressor.
-On the discharge side of the compressor, the now hot and highly pressurized vapor is cooled down through the
heat exchange with the water in the tank until it condenses into a high pressure, moderate temperature liquid.
-The pressure of the liquid refrigerant drops as it passes the throttling device.
-Finally, the refrigerant absorbs the heat from the surrounding air and evaporates into vapor with low
temperature and low pressure, where it then it goes into the compressor again.
2.2 Dimensions
Unit: mm
Dimensions (mm)
Height 2250
Condensation water outlet 1650.5
Height to water outlet 1411
Height to magnesium 1311
Height to electric heater 593
Height to water inlet 115
Height to PTR valve 1411
Diameter φ640

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Evo315-C Hot Water Heat Pump Manual
2.3 Technical Data
Model Evo315-C
Heating capacity kW 6.0
Water tank capacity L 315
Power input kW 1.46
Running current A 6.08
Power Supply 220-240V~/50Hz
Compressor Number 1
Compressor Rotary
Rated outlet water temp. Deg C 60
Noise dB(A) 52
Water inlet/outlet size inch ¾
*Auxiliary E-heater kW 4.8k
Net dimensions mm See the drawing
Shipping Dimensions mm See package label
Net Weight kg See nameplate
Shipping weight kg See package label
Measurement conditions:
Instant heating: Ambient temperature 20°C/15°C, water inlet 15°C, water outlet 55°C.
Highest setting temperature: 75°C
Working Temp Range: Ambient temperature is -5°C to 43°C (Heat Pump)
Operating parameters: The range of the operating water pressures: 0.15~0.85MPa
Freeze Protection
The Evo315-C has a freeze protection system which will protect the unit from damage by preventing ice forming in the waterways in freezing
conditions.
2.4 System Diagram

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Evo315-C Hot Water Heat Pump Manual
3. Safety Instructions
A qualified technician is required to install, relocate the unit if required and for all repairs.
Good earthing is required for both the unit and power connections to prevent electrical shock.
Ensure that there are no leaks on both the plumbing and drainage fittings.
The unit must not be installed near flammable gas or have flammable aerosols sprayed in the vicinity.
The base that the unit is installed on must be level and stable.
A circuit breaker is required to be installed with this unit.
Fingers and objects must not be placed into the fan of the unit. Children should be kept clear of the appliance.
In the event of the unit malfunctioning, shut off the power supply and contact your supplier or EvoHeat.
Power the unit off during cleaning.
The unit produces hot water and will also have hot fittings, therefore should not be touched to avoid injury.
To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and
pressure protective equipment required by local codes. A combination temperature and pressure relief valve
must be certified by a nationally recognized testing laboratory that maintains periodic inspection of production
of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems, ANSIZ21.22. This valve must be marked with a maximum set pressure not
to exceed the marked maximum working pressure of the water heater. Install the valve into an opening provided
and marked for this purpose in the water heater. Install the P&T Valve or provide tubing so that any discharge
from the valve exits only within 6 Inches above, or at any distance below, the structural floor, and does not
contact any live electrical part. The discharge opening must not be blocked or reduced in size under any
circumstances.
Hydrogen gas is produced in a hot water system served by this heater that has not been used for a long period of
time (2 weeks or more). Hydrogen gas is extremely flammable. To reduce the risk of injury under these
conditions, it is recommended that the hot water faucet be 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 faucet at the time it is open.
The appliance is fitted with a means for disconnection from the supply mains having a contact separation in all
poles that provide full disconnection under overvoltage category III conditions. These means must be
incorporated in the fixed wiring in accordance with the wiring rules.

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Evo315-C Hot Water Heat Pump Manual
4. Installation
4.1 Pipeline Connection
Installation of the water inlet or outlet pipes: The specification of the water inlet and outlet threat is BSP3/4(internal
thread). Pipes must be heat-resistant and durable.
Installation of the pipe for P&T valve: The spec of the valve connecting thread is BSP3/4(internal thread). After
installation, it must be confirmed that the drainpipe outlet is exposed in the air. When the flexible drainpipe is joined
to the pressure relief orifice of this valve, you must ensure that the flexible drainpipe is pointing downwards and
exposed in the air.
ATTENTION
The P&T valve attached with the unit must be installed. Failure to do so will cause damage to the unit and possible
personal injury.
Do not use stainless steel fittings to connect directly with other metals to prevent galvanic corrosion.
Drain the water tank through the drain valve at the bottom part of the unit.
Do not dismantle the P&T Valve.
Do not block off the drainpipe as it may cause an explosion or injury.
Note: A pressure releasing valve is
to be fitted in the installation.
Spec of the P&T Valve:
- Pressure: 0.85MP
- Temperature: 99

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Evo315-C Hot Water Heat Pump Manual
4.2 Handling & Transportation
As a rule, the unit should be stored and/or transported in its shipping container in an upright position and without
water charge. For transport over short distances, and provided due care is exercised, an inclination angle of up to 30
degrees is permitted. During transport and storage, ambient temperatures of 0 to 40 degrees Celsius are
permissible.
Forklift Transportation
When transported by a forklift, the unit must remain mounted on the pallet. The lifting speed should be kept to a
minimum. Due to its top heaviness the unit must be secured against tipping over. To prevent any damage or injury,
the unit must be placed on a level surface.
Manual Transportation
For manual transport, the unit can be placed on a wooden pallet. Using ropes
or carrying straps, a second or third handling configuration is possible. With
this type of handling, care must be taken that the maximum permissible
inclination angle of 60 degrees is not exceeded. If transport in an inclined
position cannot be avoided, the unit should be left to rest at least one hour
after it has been moved into final position before operation.
CAUTION: High centre of gravity, place on a level surface!
4.3 Location of Install & Minimum Clearances
CAUTION: The installation must comply with AS/NZS 3500.4
The minimum space of installation is 11 cubic metres.

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Evo315-C Hot Water Heat Pump Manual
The Evo315-C is designed for external installation; however, if possible, installing
the system under the house eaves or in a sheltered environment may help prolong
the life of the system.
1. The unit must be installed, operated and maintained in good order and
accordance with these instructions.
2. If the water supply exceeds rated pressure a pressure reducing valve is to be
fitted.
3. Water may discharge from the drainpipe and this must be left open to the
atmosphere.
4. The pressure relief valve must be operated at least every 6 months to ensure
correct operation. The drainpipe from this valve should not allow water to
collect in pipework.
5. Facilities for draining and filling the unit must be provided to maintenance.
Drain points must be at the lowest point of the system.
6. Check before installation that your water pressure is within required limits. Use a filter and pressure relief valve
on the inlet as required. A water softening device will also be required in hard water areas.
7. This heat pump must be installed by a licensed contractor. Do not attempt to install yourself if you are not
qualified. The Evo315-C must be installed to conform to all relevant Australian Standards and Industry Codes
including but not limited to:
a. Electrical and Electrical Safety
b. Plumbing and Hot Water Storage
c. Heat Pump Installation and Operation
Installation must also comply with any local, state or federal codes at the installation site. Failure to comply can void
your warranty, damage your unit and cause possible injury or death. Plumbing must comply with AS/NZS3500.4
4.3.1 Indoor Installation Recommendations
•Heat pumps operate most efficiently with warmer air temperatures, and the outlet air from the unit will
always be colder than the inlet air. Therefore, it is advisable to install the unit so it receives the warmest air
temperatures possible and that the cold air is not able to recirculate back into the unit.
•The unit may be able to be installed in an unventilated room exceeding 25m3in volume.
•Venting of cold air is always advisable to prevent the air temperature dropping and lowering the efficiency of
the unit.
•Think of the unit as a 3kW air conditioner for the effect it will have on a closed room.
TO COOL THE ROOM USING THE EVO315-C
Install the unit so the outlet from the heat pump is blowing INTO the room. The room MUST have some form of air
outlet otherwise the performance of the unit will suffer significantly.
TO MAINTAIN THE ROOM AT NORMAL TEMPS USING THE EVO315-C
Install the unit so the outlet from the heat pump is blowing OUTSIDE the room. The room MUST have some form of
air inlet otherwise the performance of the unit will suffer significantly.

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Evo315-C Hot Water Heat Pump Manual
4.4 Cable Connection
The power cable is stored in the back of the unit, it’s for power supply of the unit.
The unit requires an isolating switch as required by local laws. If the power cord is damaged, it must be replaced by a
qualified electrician.
4.5 Filling the Tank
Open a hot water tap inside the house. Open the cold-water inlet valve into the Evo315-C to fill the tank. When
water begins flowing out of the hot water tap inside the premises, turn off the hot water tap.
4.6 Initial Start-up of the Unit
Pre-Inspection
Check the water supply to the tank and pipe connections for possible leaks.
Check that the following devices are installed and operating correctly:
-Drainpipes
-P&T Valve
-Filter on inlet
-Water softening and pressure reducing devices if required.
Check that all power connections are secure before switching on.
Check that the installation space is adequate.
Trial Operation
Switch on the unit by using the controller.
In the case of any unusual noises, switch the power off and consult your provider.
The parameters have been pre-set to a temperature of 60 degrees. Check that the unit is operating by looking for an
increase in water temperature over time.

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Evo315-C Hot Water Heat Pump Manual
5. Operation
5.1 Main Controller Interface
ICON
NAME
FUNCTION
ON/OFF Turn the unit on or off.
UP Select options to increase values
DOWN Select options to decrease values
CLOCK Set the clock or the timer.
HYDROBOOST Turn on/off the electric heater
MODE
Switch unit running modes or save
setting parameters
TOUCH TIMING Touch setting timing
Icon
Name
Meaning
Icon
Name
Meaning
Heating Mode Enable heating mode Lock Keyboard is locked
Eco Heating
Mode Enable Eco heating mode
DTU State of DTU connection
Intelligent
Mode Enable intelligent mode
Wi-Fi State of Wi-Fi connection
*Only available as an optional upgrade
High
Requirement
Mode
Enable High requirement mode Time Time is displayed
Vacation
Mode Enable Vacation mode
Lower tank
temperature
Temperature of the lower
tank
Fan Fan is on
Parameter
setting Parameter is adjustable
Hydroboost The Hydroboost setting is on Minute Minute value is being set
Set
Temperature
Reached
Set temperature has been
reached and the unit will shut
off automatically
Second Second value is being set
Defrost The unit is defrosting

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Evo315-C Hot Water Heat Pump Manual
5.2 Functions of the Controller
5.2.1 Turning the Unit ON & OFF
Press and hold for 0.5 seconds in the standby screen of the controller to turn the unit on. The main display will
now show the water outlet temperature.
Press and hold for 0.5 seconds in the running screen of the controller to turn the unit off. The main display will
now show “OFF”.
The unit will dim the screen and display the standby screen when the controller has not been touched for a minute.
Touch the power button to wake it.
Note: The ON/OFF button can only be used to turn the unit on/off in standby or on the running screen of the controller.
5.2.2 Mode Selection
From the running screen, press to select one of the modes: Heating, Eco Heating, Intelligent, High requirement,
Vacation.

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Evo315-C Hot Water Heat Pump Manual
5.2.3 Target Temperature Checking & Setting
In the standby or running interface, press or once to check the target temperature of the outlet water.
Press or again to change the target temperature.
After making changes to the desired temperature, press to confirm or to cancel, then return to the previous
screen.
If the keypad is left idle for 5 seconds, the controller will exit the menu automatically and apply any changes that
were made.
Example: The target temperature is 40°C, the actual outlet water temperature is 18°C.
5.2.4 Hydro Boost Setting
The hydro boost setting (also known as Electric Heater) can be turned on when the unit is heating or in standby mode.
Press " " once to turn on hydro boost and press " " again to shut it off.
When the is unit off, press " " to turn on the hydro boost mode. At this time, the " " will light up. The main
display area alternate 2S shows "OFF" and outlet water temperature.
Press " " again to turn off the electric heating mode, the main display will display " OFF "

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Evo315-C Hot Water Heat Pump Manual
5.2.5 Setting the Time and Date
In the standby or running interface, press once, the hour digit will flash.
Press the or to change the hour setting, then press to confirm.
Press the or to change the minute setting, then press to confirm.
During the process, you can press at anytime and the system will exit the operation without saving.

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Evo315-C Hot Water Heat Pump Manual
5.2.6 Setting the Timer
Timer settings can be set in standard mode, economic mode, auto mode and fast heating mode. Note: there are two
types of timing settings: touch and button. The unit will run during the lit time periods and stop on the dim areas.
Touch
Press and hold for 2 seconds (the timer display will flash)
When the timer display flashes, choose your start-up time (A) and end time (B).
Press to save the setting and exit back to the main interface.
Button
Press and hold for 2 seconds (the timer display will flash)
When the timer display flashes, choose the start-up time (C) and end time (D) by pressing or and .
Press to save the setting and exit back to the main interface.
Example: Setting the unit to run from 7-11am & 4pm-6pm using Touch mode.

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Evo315-C Hot Water Heat Pump Manual
5.2.7 Cancelling the Timer
To cancel a timer once it has been set, hold down the CLOCK button for 2 seconds until the timer display begins
flashing (as you would set the timer).
Press the POWER button while the timer is flashing to cancel it. The yellow timing periods will disappear when
the timer has been cancelled.
5.2.8 Vacation Mode
Ensure the unit is ‘OFF’ before setting vacation mode. The date you set in this mode will determine what date the
unit starts back up.
After selecting vacation mode, press and hold for 2 seconds, the ‘month’ value will begin to flash in the display
area. Press the UP or DOWN arrows to display the desired month, then press to confirm and move to
altering the ‘day’ value.
The ‘day’ value will flash when it is selected, use the arrow keys to select your desired start day, then press to
save all changes and exit back to the main interface.
Note: Format is mm/dd
Example: The unit will start up on September the 28th.

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Evo315-C Hot Water Heat Pump Manual
5.2.9 Keyboard Locking
Press and hold for 5s to lock the keyboard. To unlock, press and hold for 5s again.
5.2.10 Force Defrosting
In the shutdown state, press for 10 seconds to enable the forced defrosting function. The defrosting symbol
will light up. Press for 10 seconds again to exit the forced defrosting function.
5.2.11 Fan/Ventilation Function
The fan speed (High Speed, Low Speed or Off) can be controlled by the fan mode on the controller.
Note: when the compressor is on, the fan will always run at high speed.
When the parameter HO2 is set to 1, press the for 2s.
Once you hear a beep you can set the ventilation mode. Press for 2s, this
will change the fan speed. Continue to press for 2s until you reach your
preferred speed.
Fan mode symbols:
High Speed
Low speed
Fan icon disappears: off
Note: When H02 is set to 0, there is no ventilation function.

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Evo315-C Hot Water Heat Pump Manual
6. Troubleshooting
6.1 Parameters Explained
No. Meaning Range
Default
value
Details
Hardware parameters
/01 The usage of the O05 port 0/2 0
0-Low speed / 2-Solar water
pump
/02 High temperature disinfection target temperature 0/2/3 0
0-No output / 2-Solar water
pump / 3- Solar drain valve
Defrost parameters
D01
Heating enter defrosting coil temp value
-30~0
-3
D02
Heating exit defrosting coil temp value
0~30
13
D03
Heating defrost cycle
30~90min
45min
D04
Heating the maximum defrosting time
1~20min
8min
D05
Heating the minimum defrosting time
0~D04
3min
D06 Heating the minimum defrosting time 0~2 0
0-Standard / 1-Economic / 2-
Intelligent
D07
Intelligent defrost temperature conversion point
-10~20
4
High temperature disinfection parameters
G01
High temperature disinfection target temp
30~70
60
G02 High temperature disinfection running time 0~90min 0min
When G02= 0, no high
temperature disinfection
function
G03
High temperature disinfection startup time
0~23H
0h
G04
High temperature disinfection cycle
7~99Days
7
EEV parameters
E01
EEV adjustment mode
0/1
1
0- Manual / 1- Auto
E02
EEV target overheat temp
- 20~20
5
E03
EEV initial steps
0~500
240
E04
EEV minimum steps
0~500
80
E05
Defrosting EEV steps
0~500
480
System parameters
H01
Whether enable the power down memory function
0/1
1
0-No / 1-Yes
H03
Heat source mode
0
0
H07
Fahrenheit / Celsius
0/1
0
0-Celsius / 1-Fahrenheit
H30
Unit address
4(1~255)
0
H31 Remote control mode 0/1 0
0-Centralized control / 1-
DTU&WIFI
H32
Status parameter feedback to cloud cycle
1~255min
0
H98
Type of unit parameter
2/3
0
2-0*08 / 3-0*18
H99
Main display temp showing adjustment
0/1
0
0-No / 1-Yes
Solar water pump parameters
N01 Which temp sensor used for controlling the solar
water pump 0/1 0
0-Water tank bottom temp
sensor 1-Water tank top
temp sensor
N02
The maximum running time of the solar water pump
1~30min
15min
N03
The solar water pump startup return difference
0~20
5
N04
Whether enable the night cooling mode
0/1
0
0-No / 1-Yes
N05
Cooling function startup time
0~23h
0h
N06
Cooling function shutdown time
0~23h
6h
N07
Night cooling startup temp
40~90
70
N08
Night cooling shutdown temp
1~40
10
N09
Solar drain valve temp setting value
50~90
68
N10
Solar water pump shutdown temp setting value
50~90
N11 Whether enable the independent solar control
function 0 / 1 0 0-Disable / 1-Enable

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Evo315-C Hot Water Heat Pump Manual
Temperature parameters
R01
Hot water target temp setting value
38~75
55
R03
Heating, the lower temp return difference setting
value
1~20 5
R04
Whether enable the electric heater independent
setting value
0 / 1 0 0-Disable / 1-Enable
R05
Electric heating temp setting value
30~90
55
R06
Electric heat startup delay
0~450min
200min
R07
Whether the electric heater replace the compressor
0 / 1
1
0-No / 1-Yes
R08
Electric heater replace the compressor ambient temp
-20~10
-5
R09
Electric heater zero delay startup ambient temp
0~30
5
R10
Electric heater delay startup ambient temp
10~40
25
R12
The compressor force to shutdown temp
-30~-5
-15
R14
Replacement value of external heat source target
temperature
10~60 45
R15
The compressor limit temp under high ambient temp
55~80
78
R17
Whether enable the top temp sensor for controlling
the compressor startup
0 / 1 0 0-Disable / 1-Enable
R18
Heating, the top temp return difference setting value
1~20
1
R19
The compressor shutdown ambient temp 1
30~90
65
R20
The compressor shutdown ambient temp 2
30~90
55
Timing parameters
L01
Whether enable the vacation mode
0 / 1
0
0-Disable / 1-Enable
L02
The vacation mode: Year
0~99Y
0
L03
The vacation mode: Month
0~12M
0
L04
The vacation mode: Day
0~31D
0
L05
Whether enable the timing on/off function
0 / 1
0
0-Disable / 1-Enable
L06
Timing on period 1: Hour
0~23h
0
L07
Timing on period 1: Minute
0~59min
0
L08
Timing off period 1: Hour
0~23h
0
L09
Timing off period 1: Minute
0~59min
0
L10
Timing on period 2: Hour
0~23h
0
L11
Timing on period 2: Minute
0~59min
0
L12
Timing off period 2: Hour
0~23h
0
L13
Timing off period 2: Minute
0~59min
0
Switch status parameters
S01
Remote on/off switch
CL / OP
Close
S03
Low pressure protection switch
CL / OP
Close
S04
High pressure protection switch
CL / OP
Close
S05
Time-lapse signal switch
CL / OP
Open
S06
External setting switch
CL / OP
Open
Temperature status parameters
T01
Ambient temp
-30~93
/
T02
Water tank bottom temp
-30~93
/
T03
Water tank top temp
-30~93
/
T04
Coil temp
-30~93
/
T05
Suction temp
-30~93
/
T06
Solar control temp
-30~93
/
T10
App/wire controller display temp
-30~93
/
T20
Enter parameter over-range protection times
0~65535
/
T21
Memory chip EEPROM storage times
0~30000
/

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Evo315-C Hot Water Heat Pump Manual
6.2 Error Codes
Malfunction Display Cause Solution
Bottom water temp. sensor
failure P01
1. Check connection between the sensor to the PC board.
2. Check the resistance of the sensor, if the resistance is greater than 500k
or less than 100 this means the sensor is broken and will need to be
replaced.
Top tank water temp. sensor
failure P02
Ambient temp. sensor failure P04
Coil temp. sensor failure P05
Suction temp. sensor failure P07
Solar control temp. sensor
failure P034
High pressure protection E01
1. Check if the inlet/outlet water temp. difference is too high
2. Check the water flow
3. The target temp. setting needs to be reduced if it is too high
4. Check the high-pressure switch. If the switch is open when the
connection is closed, replace it.
Low pressure protection E02
1. Check if the system is leaking
2. Check the low pressure switch
3. Ensure the installation location allows for heat dissipation
4. Check the fan motor
5. Ensure the throttling device is not stuck
6. If all above are as normal, replace the PC board
Communication failure E08
1. Check the connection between the wired controller and PC board
2. Replace the wire controller
3. Replace the PC board
Anti-freeze protection in winter E09
1. Check that the high and low pressure switches are working normally
2. Check both the water tank lower temp. sensor & ambient temp. sensor
to see if they are working normally
3. See if the lower temperature of the tank is lower than 10, and the
ambient temp is lower than 0 degrees.