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Indication
Cause
Heating system stays
Pump from heating system is
cold
not functioning.
(2/2)
Pump from DHW-system is
not functioning.
3-way mixing valve is not
functioning.
Measure
Check whether the (heating) pump is correctly connected.
Check whether there is power on the (heating) pump
connections on the controller of the Theta dual service module.
The measured voltage must be 230 V
Check the (hydraulic) operation of the (heating) pump:
1. Bleed the pump, when air is present.
2. Unblock the pump of replace the pump in case of seizing.
Check whether the (DHW) pump is correctly connected.
Check whether there is power on the (DHW) pump connections
on the controller of the Theta dual service module. The
measured voltage must be 230 V
(-15%, +10%)
AC
Check the (hydraulic) operation of the (DHW) pump:
1. Bleed the pump, when air is present.
2. Unblock the pump or replace the pump in case of seizing.
Check whether the 3-way mixing valve is connected (electrical).
Check whether there is power on the (3-way mixing valve)
connections on the controller of the Theta dual service module.
The measured voltage must be 230 V
Check whether the 3-way mixing valve is correctly (hydraulically)
connected.
Check whether the 3-way mixing valve is correctly configurated
(11.5 "Configuration 3-way mixing valve").
Remark
If there continues to be insufficient or no hot water,
consult your installation engineer.
(-15%, +10%)
AC
(-15%, +10%)
AC
93
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