Wolf SPU-2, Assembly Instructions Manual

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Fault Cause Remedy
Leakage at buffer Pipe connections leaking Re-seal
Temperature difference to small at Incorrect settings on solar Change parameters (in particular
solar heat exchanger heat controller control temperature difference)
Flow (solar-side) too low Bleed solar circuit
Repair blockages
Increase pump power
Heat exchanger dirty Cleaning
None / too little discharge Reversing valve defect/ Restore function
of the tank connected incorrectly
Control of the solar return Change parameters (in particular
temperature rise (SRTA) poorly temperature difference)
adjusted/defect
Flow (heating-side) too low Bleed heater circuit,
repair blockage,
increase pump power
Undesired cooling down of tank Gravity circulation in the solar circuit Close / install
only in the lower tank area gravity brake
Undesired cooling down of tank Insulation is open / is not in contact Close insulation
in the entire tank area with the tank
Gravity circulation in the heater circuit Install / close
gravity brake
Fault/Cause/Remedy