Sinclair XK64 User manual

Wired controller XK64
SINCLAIR WATER HEATER
USER'S MANUAL
HEAT PUMPS
EN


“Originalinstructions”

Contents
1. Appearance......................................................................................1
2. Button Descriptions..........................................................................1
3. Introduction to LCD Icons................................................................2
4. Operation Modes .............................................................................3
4.1 Common Modes.........................................................................3
4.2 Special Modes............................................................................3
5. Functions..........................................................................................4
6. Operation Instructions......................................................................5
6.1 On/Off Setting.............................................................................5
6.2 Common Modes Setting.............................................................5
6.3 Special Modes Setting................................................................6
6.4 Water Temperature Setting ........................................................7
6.5 Time Setting ...............................................................................7
6.5.1 System Time Setting............................................................7
6.5.2 Timer Setting........................................................................7
6.5.3 Preset Time Setting.............................................................9
6.6 Function Setting ....................................................................... 11
6.6.1 I-KNOW ............................................................................. 11
6.6.2 RAPID................................................................................ 11
6.6.3 CYCLE, SUNFLOWER, ABSENCE, and ONCE............... 11
6.6.4 STERILIZE......................................................................... 11
6.6.5 VACATION.........................................................................14
6.6.6 CYCLE...............................................................................15
6.7 Special Function.......................................................................17
6.7.1 Keypad Lock......................................................................17
6.7.2 Cleaning (available to circular models only)......................18
6.7.3 Manual/Automatic switchover for the water return pump..18
6.7.4 Temperature unit setting (℃/℉)........................................18
6.7.5 Temperature sensor setting for ON/OFF control...............19
6.8 Errors Display...........................................................................19
7. Precautions....................................................................................20
Appendix: Errors and Symptoms.......................................................21

1
1. Appearance
2. Button Descriptions
1
i-know button
2
Timer button
3
Function button
4
Rapid button
5
Mode button
6
Up button
7
On/Off button
8
Down button

2
3. Introduction to LCD Icons
1
Display of Common Operation
Modes:
HOTWATER, SAVE, PRESET and
NIGHT mode.
6
Display of defrost, antifreeze
running, and e-heater running (or
display of the Special E-HEATER
Mode).
2
Display of RAPID and I-KNOW
function.
7
Display of hot water volume (this
function is unavailable to models
with single temperature sensor).
3
Display of CYCLE, STERILIZE,
SUNFLOWER, ABSENCE,
VACATION, and ONCE function
(the STERILIZE function may not
work for models without an electrical
heater).
8
Display of operating/standby.
4
Display of Keypad Lock function.
9
Display of actual water temperature,
temperature setpoint, error codes,
and running parameters.
5
Display of system time, preset time,
timer setting and running
parameters.
10
Display of the sub-controller. (This
function is reserved.)

3
4. Operation Modes
4.1 Common Modes
Mode Name
Description
HOTWATER
In the standard hot water mode, the uint will start or stop based on the
difference between the temperature setpoint and the actual water
temperature. If the temperature setpoint is higher than that can be
achieved by the heat pump, only the electrical heater will be used for
heating when the heat pump is unavailable.)
SAVE
This mode is similar to the HOTWATER mode. However, this mode
allows only the heat pump but not the electrical heater for heating.
Note: The SAVE mode requires proper temperature setpoint. It is
recommended that this mode is adopted when the required water
temperature is not higher than 50°C. If the temperature setpoint is too
high or the ambient temperature is too low and when the capacity of
the heat pump is insufficient, the error code L6 will be displayed and
heating will be stopped. In this case, decrease the temperature
setpoint to a value which is lower than the actual water temperature.
Then, L6 will disappear automatically.
PRESET
This mode enables time presetting for using the hot water. The unit
determines when to start based on the ambient temperature and the
difference between the preset water temperature and the actual water
temperature. When the preset period elapses, one hour later, the unit
will stop.
Once setup, this mode runs circularly every day.
NIGHT
The unit will start or stop at the fixed period from 00:00-06:00 based
on the difference between the temperature setpoint and the actual
water temperature. Beyond this period, the unit keeps off.
Once setup, this mode runs circularly every day.
4.2 Special Modes
Mode Name
Description
E-HEATER
Only when the heat pump is faulty, this mode is recommended to be
adopted.In this mode, only the electrical heater is used for heating and
determines when to start and stop based on the difference between
the temperature setpoint and the actual water temperature.

4
5. Functions
Function Name
Description
TIMER
The unit starts and stops as the timer setting.
Once setup, this function works circularly every day.
RAPID
The electrical heater is started to prepare hot water rapidly to meet
the urgent need for hot water.This function is available only when
the water tank equipped with the auxiliary electrical heater.
I-KNOW
The unit simulates the user’s habitual operation by collecting and
analyzing water data in some period and then realizes the automatic
operation. And it will remain medium water temperature when the
user does not require large amount of hot water.
CYCLE
The water pipe is preheated duly to ensure that hot water is
provided any time. Provision of hot water does not require
exhausting of cold water in the water pipe, which is different from
conventional water heaters.
STERILIZE
Water is heated to 70°C or higher (when the temperature can be set
to be higher than 70°C), to sterilize the water tank.
SUNFLOWER
By detecting the ambient temperature around a day, the water
heater enables the unit to run when the ambient temperature is
relatively high, which enables higher efficiency of the unit. At a lower
ambient temperature, the water temperature is kept at medium level
to meet users’ basic requirements.
ABSENCE
This function can be adopted when the user is absent for a short
time. This prevents frequent start-up of the unit and saves heat and
electricity.
VACATION
During the vacation set by the user, the unit keeps the water
temperature at a relatively low level to save heat and electricity. The
STERILIZE function is started one day before the vacation is over
and hot water is prepared by advance.
ONCE
The unit stops automatically after heating a tank of water. This
saves energy to the most extent when a tank of hot water is
available to the user.
Functions supported by different operation modes:
Function
Mode
RAPID
STERI
LIZE
CYCLE
I-KNO
W
SUNF
LOWE
R
ABSE
NCE
VACA
TION
ONCE
TIMER
HOTWATE
R
√
√
√
√
√
√
√
√
√
SAVE
√
√
√
√
√
√
√
√
√
PRESET
√
√
√
×
×
×
√
×
×
NIGHT
√
√
√
×
×
×
√
×
×
E-HEATER
×
×
√
×
×
×
×
×
√

5
6. Operation Instructions
6.1 On/Off Setting
The unit will be started or stopped by pressing the “On/Off” button.
Note: After energization and under normal communication, the LCD will display the
water temperature, time, and hot water volume (for models with dual temperature
sensor) under both On and Off states of the unit. It means the Off state if the LCD does
not display the running mode, as shown in the following figure.
6.2 Common Modes Setting
In the On state of the unit, press the MODE button to switch the operation modes in
the following sequence:
HOTWATER SAVE PRESET NIGHT
The HOTWATER mode is shown in the following figure.

6
6.3 Special Modes Setting
If the heat pump of a water heater equipped with an electrical heater is faulty,
users can press and hold MODE+RAPID for 5 seconds in any mode under the On state
to enter the E-HEATER mode.
Note: The E-HEATER mode can be used only when the heat pump is faulty. In this
case, contact the aftersales service immediately.
The E-HEATER mode is shown in the following figure.
In the E-HEATER mode, users can press the MODE button to switch to the
HOTWATER mode. Note that the E-HEATER mode will be cancelled automatically and

7
the HOTWATER mode will be started upon restart of the water heater in the case of
blackout.
6.4 Water Temperature Setting
In the On state, press ▲to increase or press ▼to decrease the temperature
setpoint. The water temperature will increase or decrease continuously by 1°C when
the button is pressed and held.
The minimum temperature setpoint for all models is 35°C. The maximum
temperature setpoint can be set to 55°C, 58°C, or 70°C. For details, see the Integrated
Unit User Manual.
6.5 Time Setting
6.5.1 System Time Setting
In the main interface, press and hold the TIMER button for 5 seconds. The system
time setting interface is displayed. The clock icon is on and the hour value blinks. Press
▲ or ▼ to adjust the hour value and press the TIMER button to confirm setting. Then
the minute value flickers. Press ▲ or ▼ to adjust the minute value and press the
TIMER button to confirm setting. After system time setting is saved, the main interface
is displayed. In the setting process, if no button is pressed within 15 seconds, the main
interface will be displayed and setting will not be saved.
The system time ranges from 00:00 to 23:59. Each time you press ▲ or ▼, the
time increases or decreases by 1 hour or 1 minute. When the button is pressed and
held, the time increases or decreases continuously by 1 hour or 1 minute.
The setting process is shown in the following figure.
Main interface Hour value of the
system time
blinks.
Minute value of
the system time
blinks.
Press and hold the
TIMER button. Press the TIMER
button.
Press ▲or ▼to
adjust the value.
Press ▲or ▼to
adjust the value.
Press the TIMER
button. Setting is complete.
6.5.2 Timer Setting
Timer setting: Under the HOTWATER or SAVE mode or under the Off state,

8
press the TIMER button to enter the timer setting interface. The TIMER and ON icons
are on and the hour value blinks. Press ▲ or ▼ to adjust the hour value and press the
TIMER button to confirm setting. Then the minute value flickers. Press ▲ or ▼ to
adjust the minute value and press the TIMER button to confirm setting. Then the OFF
icon is on and ON icon is off. The hour value blinks. Press ▲ or ▼ to adjust the hour
value and press the TIMER button to confirm setting. Then the minute value flickers.
Press ▲ or ▼ to adjust the minute value and press the TIMER button to confirm setting.
After the scheduled on/off time setting is saved, the main interface is displayed. In the
setting process, if no button is pressed within 15 seconds, the main interface will be
displayed and setting will not be saved.
Timer cancelling: After the scheduled on/off time is set, press the TIMER button
to cancel it.
Note: The scheduled on time and off time cannot be the same; otherwise, the LCD
switches to the interface for resetting the timer.
Main interface Timer is on and
the hour value
blink.
Timer is on and
the minute value
blink.
Press the
TIMER button. Press the
TIMER button.
Press ▲or ▼to
adjust the value.
Press ▲or ▼to
adjust the value.
Timer is off and
the hour value
blink.
Press ▲or ▼to
adjust the value.
Press the
TIMER button.
Timer is off and
the minute value
blink.
Press the
TIMER button.
Press ▲or ▼to
adjust the value.
Press the
TIMER button.
Press the
TIMER button.
Cancel the timer.
Setting is
complete and the
timer is started.

9
6.5.3 Preset Time Setting
In the PRESET mode, hot water is prepared in advance by the preset time.
In the main interface of the PRESET mode, press the TIMER button to enter the
selection interface. PRESET 1 blinks while PRESET 2 and PRESET 3 are not
displayed. Press ▲ or ▼ and the LCD blinks circularly in the flowing sequence:
PRESET 1 –PRESET 2 –PRESET 3 –PRESET 1.
Preset time setting: Press the TIMER button to select PRESET 1. Then the
PRESET 1 icon is on and the hour value blinks. Press ▲ or ▼ to adjust the hour value
and press the TIMER button to confirm setting. Then the minute value flickers. Press ▲
or ▼ to adjust the minute value and press the TIMER button to confirm setting. After
time setting for PRESET 1 is saved, the main interface is displayed.
PRESET 2 or PRESET 3 setting: Press the TIMER button to select PRESET 2
and then the ON icon blinks. Press ▲ or ▼ to switch the ON and OFF icons. When the
ON icon blinks, press the TIMER button. Then the PRESET 2 icon is on and the ON
icon is off. The hour value blinks. Press ▲ or ▼ to adjust the hour value and press the
TIMER button to confirm setting. Then the minute value flickers. Press ▲ or ▼ to
adjust the minute value and press the TIMER button to confirm setting. After time
setting for PRESET 2 is saved, the main interface is displayed. The method for setting
PRESET 3 is the same as that for PRESET 2. (After setting is saved, the ON and OFF
icons are not displayed in the main interface as these icons are available in the setting
process.)
In the time presetting process, if no button is pressed within 15 seconds the preset
interface will switch to the main interface automatically and setting will not be saved.
If the time preset for PRESET 1, PRESET 2, and PRESET 3 is the same, it is
regarded as one timer.
The preset time can be memorized. If the preset time does not need to be reset,
users only need to select on or off.
Preset time cancelling: After time is preset for PRESET 2 or PRESET 3, users
can press the TIMER button to display the selection interface. The icon of PRESET 2
blinks. Press ▲ or ▼ and the LCD blinks circularly in the flowing sequence: PRESET 2
–PRESET 3 –PRESET 1 –PRESET 2. Select PRESET 2 and press the TIMER button.
Select to cancel PRESET 2. Then the PRESET 2 icon is on and the ON icon blinks.
Press ▲ or ▼ to select OFF. Press the TIMER button to confirm cancelling and return
to the main interface. The method for cancelling preset time for PRESET 3 is the same

10
as that for PRESET 2. Preset time for PRESET 1 cannot be cancelled. If users select
PRESET 1, the time setting interface will be displayed.
Main interface PRESET 1
blinks.
The ON icon
blinks.
Press the
TIMER button. Press ▲or ▼to select
PRESET X
The hour value
of PRESET X
blinks.
Press ▲or ▼to
adjust the value.
Press the
TIMER button.
The minute
value of
PRESET X
blinks.
Press the TIMER button.
Press the TIMER button.
The OFF icon
blinks.
PRESET 2 or
PRESET 3
blinks.
Press the TIMER button.
Press the TIMER button.
Press ▲or ▼to adjust
the value.
Press the
TIMER button.
Press ▲or ▼to
select on or off.
Setting is complete
and PRESET X is
canceled.
Setting is
complete and
PRESET X is
started.
The PRESET mode runs circularly. The water heater starts to heat up water based
on the preset time and ambient temperature and stops one hour after the preset time.

11
6.6 Function Setting
6.6.1 I-KNOW
In the On state, press the i-know button to select the I-KNOW function. To cancel
this function, press the i-know button again.
6.6.2 RAPID
In the On state, press the RAPID button to select the RAPID function. The
electrical heater is started for heat up. To cancel this function, press the RAPID button
again. Then electrical heater is stopped.
Under the E-HEATER mode, users can press the RAPID button to switch to the
HOTWATER mode. To return to the E-HEATER mode, press the RAPID button again.
6.6.3 CYCLE, SUNFLOWER, ABSENCE, and ONCE
In the On state, press the FUNCTION button to enter the interface for selecting
among the CYCLE, SUNFLOWER, ABSENCE, and ONCE functions. When a function
is selected, the corresponding icon blinks. Then users can press ▲ or ▼ to start or
cancel this function. If no operation is performed within 5 seconds, it will be regarded
that this function is not required. If this function is started, the function icon is displayed
without blinking. If this function is cancelled, the function icon will not be displayed. If no
function is selected in setting interface for 5 seconds, the interface switches back to the
original status.
6.6.4 STERILIZE
The STERILIZE function is available under four common modes. However, after
this function is set, the unit runs as under the HOTWATER mode. The water heater
controls startup and shutdown of the unit based on the difference between the actual
water temperature and that required for sterilization.
In the On state and in a common mode, press the FUNCTION button to enter the
function selection interface. When the STERILIZE function is selected, the
corresponding icon blinks. At the same time, the preset circular sterilization duration is
displayed as d:XX, as shown in the following figure.

12
During this period, the following operations can be performed:
1) Press ▲ or ▼ to start or cancel the STERILIZE function. If this function is
started, the STERILIZE icon is displayed without blinking. Sterilization will be performed
circularly by the preset d and h value; If this function is canceled, the STERILIZE icon is
not displayed. If no operation is performed within 5 seconds, it will be regarded that this
function is not required. After this function is started and when sterilization is being
performed, the function icon blinks.
2) Press the TIMER button to enter the sterilization parameter setting interface.
Press ▲ or ▼ to select the d value and then press the TIMER button to confirm the
value. When the confirmed d value is not 0, the h value setting interface is displayed.
Press ▲ or ▼ to select the h value and then press the TIMER button to confirm the
value. When the STERILIZE icon is displayed, the STERILIZE function is started. If the
STERILIZE icon blinks, the preset h value (time point for sterilization) is achieved and
sterilization is being performed.
Sterilization
Parameter
Meaning
Range
d value
Day interval for
circular sterilization
0-10 days; 0 indicates sterilization for
once only and the sterilization function
will be canceled after being performed.
h value
Time point for
circular sterilization
00:00-23:00
Circular sterilization:

13
Sterilization is performed circularly by the d value. Once the circular sterilization
conditions are met, sterilization is performed regardless of on/off status of the controller
and beyond limit of common modes and functions except VACATION. However, users
can stop sterilization under process by pressing the ON/OFF button to shut it down.
(But it can only stop sterilization for this time without affecting circular sterilization, the
preset circular sterilization function still works.)
OFF reminder for sterilization failure:
If the OFF icon is displayed at the clock position after the STERILIZATION function
is started, sterilization fails and the water temperature required for sterilization cannot
be reached. The OFF reminder can be canceled when any button is pressed.
The OFF reminder only indicates that sterilization fails for this time without
affecting circular sterilization.
The OFF reminder is shown in the following figure.
Note:
①When time goes from 23:59 to 00:00, the system enters a new day, which is the
basis for increasing the number of days.
②Every time after the STERILIZE function is started or sterilization parameters
are adjusted in the sterilize function setting interface, sterilization will be
performed for once immediately and the day interval for sterilization will be
recalculated accumulatively. Even when sterilization is being performed,
operations such as sterilize function resetting and day interval adjusting for
sterilization will also cause recalculation of the day interval.

14
③After the circular sterilization function is set, the water heater can still precisely
calculate the day interval for sterilization accumulatively and the circular
sterilization function can still work in the case of short-term power failure. If the
time point for sterilization is within the power failure duration, sterilization will be
made up once power is provided again. In addition, the day interval for
sterilization will be recalculated accumulatively based on this sterilization and
next sterilization will be calculated accordingly.
④Ensure that there is no long-term power failure; otherwise, the clock of the water
heater will malfunction and the STERILIZE function will not work properly.
⑤Under the E-HEATER mode, the STERILIZE function is unavailable.
6.6.5 VACATION
In the On state, press the FUNCTION button to enter the function selection
interface. When the VACATION function is selected, the corresponding icon blinks. At
the same time, the preset number of vacation days is displayed at the clock position, as
shown in the following figure.
During this period, the following operations can be performed:
1) Press ▲ or ▼ to start or cancel the VACATION function. After this function is
started, the VACATION icon will be displayed without blinking and the water heater
runs based on the preset number of vacation days; If this function is canceled, the
VACATION icon will not be displayed. If no operation is performed within 5 seconds, it
will be regarded that this function is not required.

15
2) Press the TIMER button to set the number of vacation days. Press ▲ or ▼ to
select the number of vacation days from 3 to 120 days and press the TIMER button to
confirm setting. Then press ▲ or ▼ to start or cancel the VACATION function.
When the VACATION function is started under the On state, the water heater
calculates the number of vacation days accumulatively. And the STERILIZE function
will be started to sterilize the water tank one day before the vacation is over. In addition,
hot water is prepared by advance in the HOTWATER before the vacation is over.
Note:
①When time goes from 23:59 to 00:00, the system enters a new day, which is the
basis for increasing the number of days.
②Every time after the VACATION function is started or the number of vacation
days is adjusted in the vacation function setting interface, the number of
vacation days will be recalculated accumulatively. Even when the VACATION
function is being performed, operations such as vacation function resetting and
vacation day adjusting will also cause recalculation of the number of vacation
days.
③After the VACATION function is set, the water heater can still precisely calculate
the number of vacation days accumulatively in the case of short-term power
failure. But ensure that there is no long-term power failure; otherwise, the clock
of the water heater will malfunction and the VACATION function will not work
properly.
6.6.6 CYCLE
The water pipe between the water tank and the water acquisition position is
preheated duly when hot water is available in the water tank. This enables immediate
provision of hot water without requiring exhausting of cold water in the water pipe,
which is different from conventional water heaters. This function requires installation of
the water return system during unit installation. The water returning system consists of
the water return pump, water return pipe, check valve for the water return pipe, and
cycle temperature sensor for the water return pipe.
The CYCLE function enables both automatic and manual control. The later one is
adopted by default. For details on the setting method, see description on manual and
automatic switchover of the water return pump in section 6.7.3.
Manual control: After the water return system is installed and manual control is
set on the wired controller, press the FUNCTION button on the wired controlled before

16
hot water is needed by the user. The CYCLE icon blinks. Press ▲or ▼,the CYCLE
icon keeps on and then blinks if the manual return function is started.The unit preheats
the water pipe with hot water in the water tank. This method requires manual operation
but minimizes energy consumption.
Automatic control: Within the scheduled duration for automatic water return, the
unit preheats the water pipe based on the pipe temperature. This method does not
require manual operation but consumes more energy.
Steps of setting scheduled time for automatic water return are as follows:
(The automatic control mode needs to be set. For details on the setting method, see
description on manual and automatic switchover of the water return pump in section
6.7.3.)
Step 1: Press the FUNCTION mode to select the CYCLE function. The CYCLE
icon blinks.
Step 2: Press the TIMER button to enter the scheduled time setting interface for
water return. The TIMER character, time value, and ON character are displayed at the
time position, which together indicate the scheduled start-up time. When the hour value
for scheduled start-up blinks, it can be set by pressing ▲ or ▼.
Step 3: After the hour value is set, press the TIMER button to switch to the minute
value for scheduled start-up. When the minute value blinks, it can be set by pressing ▲
or ▼.
Step 4: After the minute value is set, press the TIMER button. The ON character
disappears and the OFF character is displayed. Meanwhile, the hour value blinks,
indicating that the scheduled shutdown time can be set by pressing ▲ or ▼.
Step 5: After the hour value is set, press the TIMER button to switch to the minute
value for scheduled shutdown. When the minute value blinks, it can be set by pressing
▲ or ▼.
Step 6: Press the TIMER button to switch back to the CYCLE function selection
interface. If the CYCLE character blinks, the scheduled time for water return is
successfully set to a new value.
Step 7: When users press any button except the TIMER, FUNCTION, ON/OFF,
and ▲/▼ buttons shortly or stay in the selection interface for 5 seconds, the current
interface exits automatically and whether the CYCLE character is displayed is
determined based on the scheduled time for water return.

17
Main interface The CYCLE icon
blinks. The water return
timer is on and the
hour value blinks.
The water return
timer is on and the
minute value
blinks.
The water return
timer is off and the
hour value blinks.
The water return
timer is off and the
minute value
blinks.
Press the
FUNCTION button. Press the TIMER button. Press the TIMER button.
Press the
TIMER button.
Press the
TIMER button.
Press the
TIMER button.
Press ▲or ▼to
adjust the value.
Press ▲or ▼to
adjust the value.
Press ▲or ▼to
adjust the value.
Press ▲or ▼to
adjust the value.
Schedule time for
water return is
successfully set.
6.7 Special Function
6.7.1 Keypad Lock
In normal status of the unit, press and hold ▲+▼ for 5 seconds. The LOCK icon is
displayed on the controller and all buttons become unavailable. The LOCK icon blinks
when any button is pressed. To cancel the Keypad lock function, press and hold ▲+▼
for 5 seconds again. Then the LOCK icon disappears.
If the unit is faulty, the lock function becomes invalid and all buttons are available
again. The Keypad lock function will resume after the error is rectified. In addition, the
lock status before power failure is memorized.