Hermann Wall-Hung Boiler Notification: Heating system not working - Pre-repair check.
Cause of the fault:
1. The water pressure value on the water pressure gauge of the wall-hung boiler may be below 0.5 bar (bar). The water pressure in the heating system is too low, causing the heating system of the wall-hung boiler to fail.
2. A fault with the wall-hung boiler itself may cause the heating system to fail.
Fault resolution methods:
1. Please check the water pressure gauge of the wall-hung boiler. If the water pressure indicated on the gauge is below 0.5 bar, please use the water charging switch of the heating system of the wall-hung boiler to charge and increase the water pressure promptly, raising the water pressure of the heating system to 1.2 bar. At this point, the wall-hung boiler will automatically resume operation.
2. After you have confirmed that item 1 has been done as required, if the wall-hung boiler still cannot operate normally, this indicates a fault with the wall-hung boiler itself. Please contact after-sales service.
Source of information: Beijing Hermann Wall-Hung Boiler Repair Center http://blog.sina.com.cn/heermanbigualu.