Faults Displayed With A Fault Code; Faults Displayed Without A Fault Code - Viessmann Solar EM-S1 Extension Installation And Service Instructions Manual

Troubleshooting

Faults Displayed with a Fault Code

Faults Displayed Without a Fault Code

Fault
Solar yield too low
Solar circuit pump not running
or runs constantly.
Solar control unit switched off
12
Cause
Temperature sensors interchanged.
Air in the solar circuit
Inadequate flow rate
Incorrect circulation
Temperature sensors interchanged.
Solar circuit pump faulty or
incorrectly connected
Fuse F1 has responded.
Solar EM-S1 Extension Installation / Service
Meaning of the fault codes
Heat generator installation and service
instructions
Remedy
Check temperature sensor connections.
Vent the solar circuit. Check flow rate.
Check flow rate.
Check connection of output sF (see page 7).
Check hydraulic connections.
Ensure check valves are operating correctly.
Check the system characteristics.
Check temperature sensor connections.
Solar circuit pump faulty or incorrectly connected
Check solar circuit pump connection (see page 7).
Carry out an actuator test.
Check fuse F1. See page 15.
Disconnect consumers. Connect again in
sequence, and observe the behaviour of fuse F1.