EAS ELECTRIC EMCH Serie Manual De Instalación Y Manual De Usuario página 187

18.5.13. PH
PH: Large temperature differential protection
between water out and water in
Check whether actual temperature
difference between water out and
water in is large than14°C
Yes
The water flow rate is not sufficient
The water system is blocked
The water pump speed is suitable
The additional water pump is not suitable
selected
Select a suitable additional water pump
92
No
Water in and water out
temperature sensor are
correctly connected and
effectively
Correct connect the temperature sensor
or replace temperature sensor
Yes
No
No
Yes
Yes
No
Check the system and fix the problem
Adjust water pump to high speed suitable
V.2
PCB is damaged.
Replace PCB