Warmup WHS-M-S3-Series Installation Manual page 31

Performance Troubleshooting
Detailed Troubleshooting
No heat in any zone
Some zones do not
become warm
Zone taking a long time
to warm up
1. Check thermostat/controls are set 'on'
2. Check the heat source is operating and supplying heat to the UFH
system
3. Check the primary isolation valves are open
4. Check the mixing unit bypass is closed
5. Check circulator isolation valve is open
6. Ensure flow gauges are balanced correctly (Refer to step 9 - Circulator
Connection & Circuit Balancing, page 22)
7. Check isolations caps are open. If actuators are fitted, check operation
and signal voltage
1. Ensure any trapped air has been expelled from the system (Refer to step
7 - Circuit Filling & Purging, page 18)
2. Check zone thermostat/controls are set to constant
3. Check zone flow gauge is balanced correctly (Refer to step 9 - Circulator
Connection & Circuit Balancing, page 22)
4. Check circuit isolator cap is open. If actuator fitted check operation and
signal voltage.
5. Check circuit pipework and actuator wiring are correct
1. Check zone flow gauge is balanced correctly (Refer to step 9 - Circulator
Connection & Circuit Balancing, page 22)
2. Check the circulator is operating while the zone thermostat is
demanding for heat
3. Check the zone isolating cap is fully open
4. Check zone actuator is fully opening (a blue band will be visible as the
actuator cap rises)
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