28 l Uponor Combi Port BASE XU l Installation manual
7
Troubleshooting
Fault description
Cause
Solution
Hot water function
Hot water temperature too low
or volatile
Central heating
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setpoint.
Heating circuit pump type not supported
The following pump type is supported:
- Wilo Yonos Para
Setting for heating circuit pump is not correct
Heating circuit pump setting: Constant pressure
Pump performance too low
Check pump performance
Mixing valve faulty
Check mixing valve function
Setting for heating circuit control is not correct
Check heating circuit control setting
Heating circuit control faulty
Check heating control function
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Cold water pressure too low/too high
Cold water pressure at unit: min. 2 bar, max. 4 bar
Combination heat interface unit
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Strainer in cold water input dirty
Clean the strainer in the cold water input
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is working
Air in the system
Vent the system while dispensing
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the heat exchanger
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using heat meters:
Combi Port BASE XU: 15 l/min
Combi Port BASE XU: 21 l/min
Heat meter type not supported
Use heat meter type with Qn 1.5, ultrasound
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Heat exchanger dirty
Clean the heat exchanger
Thermostatic hot water temperature limiter:
Setting is not correct
Check the thermostatic hot water temperature
limiter is working and correctly set
PM valve does not switch over
Replace the PM valve
Waiting time for hot water is too long
Check the pump setting in the central heating
system
Pump setting: Constant pressure
The temperature setting on the thermostatic lead
module is too low
Increase the temperature setting on the
thermostatic lead module
The capillary on the thermostatic lead module is
dirty
Clean the capillary on the thermostatic lead module
No thermostatic lead module available
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Noise generation
Noise generated in the station
Pipe clamps too tight
Loosen pipe clamps
Whistling noises during dispensing
Cold water strainer is dirty
Clean the cold water strainer
Cold water throttle valve is dirty
Clean the cold water throttle valve
Noise generated in the PM valve
Noise generated via a third route
Replace the MS disc, spring and locking ring using a
replacement kit for PM valves,
3rd route
