WMF 800 - Page 24

Boiler water system
T2-13
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
Fundamental temperature controls:
During initial heating:
 Testwhetherthetemperature<80°C
 Testwhetherthelevelsensorismakingcontact
 Heatthehotwaterboilerandsteamboileroneaftertheotherto90°C
Thedesiredtemperaturecanbesetbythecustomer,from60°Cto95°C
 Standbyheatingoperationuptothedesiredtemperature
 Heatingthesteamboileruptothedesiredtemperature130°C
Standby heating
 Continuoustestingwhetherthetemperatureislessthanthedesiredtemperature
 Switchontheheatingto1°Koverthesetregulationtemperatureand,ifnecessary,
over-temperaturerecoveryphase
Pause compensation
Thesettemperatureisincreasedafterpausesinordertocompensateforheatloss
causedbyacooledbrewingsystem.Themaximumheatingis10Kafter4minutesand
10seconds.
Heating while dispensing
 Whenbeveragesaredispensed,the“brewingwatertemperature”issettothe
“brewingwatertemperature+over-temperaturebeveragedispensing”value,
therefore89+7=96°C
Technician instructions
Afterbeingreplaced,theemptyhotwaterboilermustbelledwithwater.Otherwise,
thereisthedangerthattheheatcouldburnthroughtheemptyhotwaterboiler.
Error messages on the display
• Display“heatingup...”doesnotturnoff
• Display“watertemp.sensor”
Errors without display message
• Heatingfault
• Heatingshort-circuittothemediumintheboiler
• NTCfaultorcablebreakorcontactresistanceattheplug
• CPU
Spare parts
• Hotwaterboilerwithheatingsystem
• Insulation
h e ating u p...
water temp. sensor

See instructions, error messages, troubleshooting
Part 6