HTM HTW-V5WD2N8 Manual De Usuario E Instalacion página 173

ERROR MALFUNCTION
CODE OR PROTECTION
High temperature protection of
refrigerant outlet temp of
condenser.
Anti-freeze mode protection
Water inlet temperature is
higher than water outlet in
heating mode
DC generatrix voltage is too
low
FAILURE CAUSE
AND CORRECTIVE ACTION
1. Heat exchanger cover is not removed. Remove it.
2. Heat exchanger is dirty or something is block on the surface.
Clean the heat exchanger or remove the obstruction.
3. There is no enough space around the unit for heat
exchanging.
4. fan motor is broken, replace a new one.
Unit will return to the normal operation automatically.
1.The water inlet/outlet sensor wire connector is loosen.
Reconnect it.
2.The water inlet/outlet （TW_in /TW_out） sensor is broken,
Change a new sensor.
3. Four-way valve is blocked. Restart the unit again to let the
valve change the direction.
4.Four-way valve is broken, change a new valve.
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.
168