HTW ECO-THERMAL PLUS -V18WD2RN8PLUS Manuel De L'utilisateur Et D'installation page 146

ERROR MALFUNCTION
CODE OR PROTECTION
The balance tank low
temp.sensor(Tbt2) fault
The plate exchanger water inlet
temp. sensor (Tw_in) fault.
The main control board of
hydraulic module EEPROM
fault.
PED PCB fault
High temp. protection of
inverter module
DC bus low voltage protection
FAILURE CAUSE
AND CORRECTIVE ACTION
1.Check the resistance of the sensor.
2.The Tbt12 sensor connector is loosen,reconnect it.
3.The Tbt2 sensor connector is wet or there is water in,remove
the water ,make the connector dry.Add waterproof adhesive.
4.The Tbt2 sensor failure,change a new sensor.
1.Check the resistance of the sensor.
2. The Tw_in sensor connector is loosen. Reconnect it.
3.The Tw_in sensor connector is wet or there is water in.
remove the water, make the connector dry. Add waterproof adhesive
4. The Tw_in sensor failure, change a new sensor.
1. The EEprom parameter is error, rewrite the EEprom data.
2. EEprom chip part is broken, change a new EEprom chip part.
3. main control board of hydraulic module is broken, change a new
PCB.
1. After 5 minutes of power-off interval, power on again and
observe whether it can be recovered;
2. If it can't be restored, replace PED safety plate, power
on again, and observe whether it can be restored;
3. If it can not be recovered, the IPM module board should
be replaced.
1. Power supply voltage of the unit is low, increase the power
voltage to the required range.
2. The space between the units is too narrow for heat
exchange. Increase the space between the units.
3. Heat exchanger is dirty or something is block on the surface.
Clean the heat exchanger or remove the obstruction.
4. Fan is not running. Fan motor or fan is broken, Change a
new fan or fan motor.
5. Water flow rate is low, there is air in system, or pump head
is not enough. Release the air and reselect the pump.
6. Water outlet temp.sensor is loosen or broken, reconnect it or
change a new one.
1. Check the power supply.
2. If the power supply is OK,and check if LED light is OK, check the
voltage PN, if it is 380V, the problem usually comes from the main
board. And if the light is OFF, disconnect the power, check the IGBT,
check those dioxides, if the voltage is not correct, the inverter board
is damaged, change it.
3. And if those IGBT are OK, which means the inverter board is OK,
power form rectifier bridge is not correct, check the bridge. (Same
method as IGBT, disconnect the power, check those dioxides are
damaged or not).
4. Usually if F1 exist when compressor start, the possible reason is
main board. If F1 exist when fan start, it may be because of inverter
board.
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