Fault Repair
Problem
Possible Cause
How to Repair
The thermostat does not work 1. Not connected to power
supply.
1.Battery seat: Check if the battery
contact is in good condition.
The heating system cannot be
started.
2. If the preset temperature is
higher than the temperature
currently on display.
2. Adjust the preset temperature
higher.
The mode switch doe not work. 3. Check if the keypad is
locked.
4. Check if the unit is stopped.
3.Enter engineering setting and
change the keypad lock mode of
number 4.
4.Start the unit.
The Up, Down or OK key does
not work.
5. Check if the keypad is
locked.
6. Check if the unit is stopped.
5.Enter engineering setting and
change the keypad lock mode of
number 4.
6.Start the unit.
The room temperature
displayed on the screen is not
compliant with the actual
temperature.
7. If the equipment is under
run state.
8. If set to temperature
calibration.
7. If the equipment is running,
indicating that the temperature is in the
process of heating / cooling. The two
temperatures will be equal when the
equipment finishs operation.
8. Change the Adjustment
Temperature Setting
Cautions on Installation and Use:
1. To prevent the thermostat display from a high fluctuation, special treatment has been made to the
program. Therefore, it is normal that the thermostat cannot immediately display the sudden change
of temperature.
2. The thermostat installed in standard 86 box shall be placed 1.5m above the ground.
3. For the thermostat installed in standard 86 box or wireless thermostat with battery seat, take care not
to install it to the wall corner, door / window side or behind the door or in such unheated area as
exterior wall. Avoid hot / cold air duct, radiator, flue or thermal pipe.
4. If the wireless thermostat with battery seat is placed at a position where the air ventilation is poor, the
temperature displayed on the thermostat might be inconsistent to the indoor average temperature.
5. Only the professional technicians are permitted to open the transmitting and receiving box of the
thermostat for installation. When installing the power supply, make sure that the power cable is well
insulated.
6. To install the receiving box, please install the base plate firstly and then connect the power and
signal wire correctly before installing the upper cover and fix it. The thermostat is unrepairable
product. The user shall not open the internal circuit board.
7. Before installing the thermostat, make sure that the system is disconnected. The maximum voltage
of the system shall meet the requirements specified in the Instruction Manual (Max. AC Voltage:
250V).
