Spheros Thermo S 160, Workshop Manual

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5 Troubleshooting and error correction Thermo S 160/230/300/350/400
502
Error in the water system
Circulating pump not operating (Aquavent 6000S and
Aquavent 6000SC only). t Error mode activated.
In case of malfunctions the motor is switched off via the
error mode.
Reactivation of the circulating pump motor
For this purpose disconnect the power supply for > 2 min.
After the power supply is reconnected the motor
performs a soft start.
Heater stops as the connected heat exchanger provides
insufficient heat. Flow rate too small, because
t Air in the heater, heat exchanger or in system
sections.
t Taps/valves (flow controllers) throttled,
contaminated, closed.
t
Contaminations in the system, e.g. filters or at bottlenecks.
t Circulating pump delivery rate insufficient
(air in pump housing),
t
Insufficient frost protection.
t
System resistance too high (especially high in the cold).
t
Circulating pump defective.
Heat exchanger provides not enough heat,because
t
Air in the heat exchangers and/or system sections.
t
Contaminated heat exchanger surfaces (outside).
t
Insufficient air entry or air exit.
t
Fan: Insufficient delivery rate /
incorrect direction of rotation / resistance too high.
t Antifreeze content too high.
Approximate flow rate determination:
Heat flow [kW] according to type plate
0 6 8 x = ] h / l [ n i e t a r w o l F
Temperature difference Δt in [K] or [°C]
measured on the heater between water inlet and water outlet
(e.g. using contact thermometer)
Table 501: General error symptoms
e s u a c e l b i s s o P m o t p m y s r o r r E