22
9) “
” Function Key.
Click “
” on the main interface to switch powerful mode, smart mode, and silent
mode.
4.4. System Protection and Error Code
Error Code
Error Description
Remarks
Er 03
Water flow switch failure
Er 04
Anti-freezing in winter
Er 05
High pressure failure
Er 06
Low pressure failure
Er 09
Communication failure between main control board and wire controller
Er 10
Communication failure of inverter module(Alarm when the communication between the
external board and the driver board is disconnected)
Er 12
Exhaust over heat protection
Er 15
Water Inlet temperature sensor failure
Er 16
External coil temperature sensor failure
Er 18
Exhaust temperature sensor failure
Er 20
Inverter module abnormal protection
Er 21
Ambient temperature sensor failure
Er 23
Outlet water low temp. Protection
Er 27
Water outlet temperature sensor failure
Er 28
CT over current protection
Er 29
Water inlet temperature sensor failure
Er 32
Outlet Water Over Heat Protection
Er 33
Heating Coil Over Heat Protection
Er 42
Internal coil temperature sensor failure
E20 fault will display the following error codes at the same time, the error codes will switch every
3 seconds. Among them, error codes 1-128 appear in priority. When error codes 1-128 don’t
appear, then it will show error codes 257-384. If two or more error codes appear at the same
time, then display error codes accumulation. For example, 16 and 32 occur at the same time, it
will show 48.
