User manual
Operation 
Page 72 
English 
Operating status 
Start phase 
The EFOY COMFORT fuel cell undergoes a start phase 
lasting up to 15 minutes. At the end of this phase, it has 
reached its full rated output. 
Charging 
mode 
The EFOY COMFORT fuel cell charges the battery. 
Standby 
As long as the battery is charged sufficiently, the EFOY 
COMFORT fuel cell remains in standby mode and moni-
tors the battery voltage. 
Shutdown 
procedure 
The EFOY COMFORT fuel cell shuts down charging mode. 
To protect the components in the device, this procedure 
may take several minutes to complete. 
Antifreeze 
The EFOY COMFORT fuel cell remains active to protect it-
self from the effects of freezing. 
Battery 
protection 
The EFOY COMFORT fuel cell charges the battery auto-
matically in order to prevent deep discharge of the bat-
tery. 
Interruption 
Operation is interrupted because the ambient tempera-
ture is too high. The EFOY COMFORT fuel cell switches on 
again automatically as soon as operation can be re-
sumed. 
Error 
An error has been detected, and corresponding messag-
es are displayed. For more information, see chapter 5 
"Errors and solutions" on page 99. 
INFO: 
During normal operation, the EFOY COMFORT fuel cell briefly interrupts 
power generation several times each hour. A charging current of 0.0 A is 
displayed when this occurs. 










