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5472 726 - 02
Vitotron 100 Electric Space Heating Hot Water Heater Installation/Service
Troubleshooting
Instructions for the User
Failure to service properly may lead to further damage to
components.
Symptom
Reason
Action
All indicators on control
panel are OFF
No power to space heating water
heater
Check for 240 VAC on space heating water heater
main connection terminals
Reset manual safety high limit
Contact authorized service person
“PSI” indicator blinks
Insufficient pressure below 7 psi
Switch the controller to pressure view and increase
system pressure above the minimum required 7 psi level.
Pressure sensor failure
Switch the controller to pressure view, if display
shows - - Contact authorized service person
“GPM” indicator blinks
Pump is blocked
Unblock the pump-unscrew the screw on pump
housing and move the pump rotor manually
Heat does not circulate through
the space heating water heater
– space heating water heater is
blocked
Air bubble is caught in system, purge the installation,
pump and space heating water heater
Check 1 amp fuse on control panel
Failure of pump or flow sensor
Check power supply for circulating pump
a failure of pump or flow sensor
Contact an authorized service or the seller
Circulator indicator blinks
Lack of water flow - 2.1 GPM min Adjust flow characteristics as needed
“Heating status” is off
No thermostat connection
Insure thermostat is calling for heat and is above
ambient temperature set point
Verify connections on thermostat
Failure of control board
Check fuse on control panel glass fuse 6.3 x 32 mm 2A
“Heating status” blinks
Off Peak signal = no heat
Electric utility off peak control
and “Inlet temp.” blinks
A failure of inlet temperature
sensor, space heating water
heater in failure condition
Check connection or replace thermistor sensor
and “Outlet temp.” blinks
A failure of outlet temperature
sensor or loose connection
Check connections
Replace HC-DN 15 sensor
Space heating water
heater does not heat
Failure of cylinder temperature
sensor
Contact authorized service person for replacement of
cylinder temperature sensor or thermostat
A failure of control panel
Contact authorized service person
EEE message on display
Data record error
Contact authorized service person
Insufficient heat output
Heating elements
Check for resistance on elements
Control panel set up failure
Insure control panel is set up for correct kW and
number of heating elements through advanced settings
Care and Maintenance
1. In order to protect flow sensor located within the
space heating water heater, it is imperative that the
pre-installed magnetic filter is removed and cleaned
at least annually. Failure to clean out this filter could
increase contamination of the space heating water
heater by system residue.
Do not attempt to service this space heating water heater
unless you have been trained in all aspects of its functionality
and methods to repair.
2. Periodically check system pressure.
Contact authorized service person to make
adjustments
only.
