Troubleshooting
39
Correction
Page
Sensors
Check outdoor temperature sensor 40
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Check boiler temperature sensor 40.................................................................
Check DHW tank temperature sensor or low-loss header
temperature sensor 41
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Check and replace differential air pressure sensor 41...............................
Control components
Relay test 42
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Check safety fixed high limits 43........................................................................
Check fuse 43.............................................................................................................
Check thermostatic radiator valves 43............................................................
Accessories
Control unit for weather-responsive operation
H Check WS remote control unit (Accessory) 44
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H Check RS remote control (Accessory) 44...................................................
5285 961 v1.3
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