How To Operate A Dometic Single Zone SZ1 RV Thermostat

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Become a Patron: / myrvworks • Parts and Tools Affiliate Links: https://myrvworks.com/resources/darre... • Service Manuals: https://myrvworks.com/manuals/ • http://myrvworks.com • Certified Mobile RV Technician, Darren Koepp, shows you how to operate the Dometic SZ1 RV Thermostat. • If you are in need of RV Repairs in the Olympic Peninsula area of Washington state, submit a service request on our website at http://myrvworks.com today! • To access Diagnostic Mode on the SZ1 thermostat follow these steps: • System in Off mode • Simultaneously press 'Mode', '+' and '- • LCD will display '00' • Press 'Mode' to exit • Diagnostic Command • Description • 00 = All outputs OFF • 01 = Low Speed Fan ON • 02 = High Speed Fan ON • 03 = Compressor ON • 04 = Furnace Output ON • 05 = Reversing Valve ON ( Heat Pump Version only ) • 06 = Heat Strip ON ( Heat Strip Version only) • 07 = LCD shows Room Temperature Or E2 if out of range / Or E3 if thermistor is shorted. • 08 = LCD shows inside Coil Temperature Or E5 if missing/open • 09 = LCD shows Outdoor Temperature ( Heat Pump Version only) Or E4 if missing/open • ERROR CODES: • E1 = Loss of communication “Causes Relay Control Module to shut down”; “No operation of any systems” • E2 = Indoor room Air Sensor Open/Out of range. “No Heat or Cool operations”; “Fan only mode still operates” • E3 = Indoor room Air Sensor is shorted; “No Heat or Cool operations”; “Fan only mode still operates” • E4 = Outdoor Temperature Sensor is Open/Out of range. (Heat pump version only); “No Heat Pump operation”; “Air Conditioner, Furnace fan modes will still operate” • E5 = Freeze Sensor Open/Out of Range “No Cool operation”; “Furnace, Heat Strip, Heat Pump Fan modes will still operate” • Topic: Dometic Single Zone (SZ1) Thermostat Operation • • System: Dometic Air Conditioner SZ1 Thermostat • • Tools Used: • Propper Men's Short Sleeve Tactical Shirt - https://amzn.to/2XXF1Vu • Propper Men's Tactical Pant Poly/Cotton Ripstop - https://amzn.to/2Yh4BUC • • Related Video's: • Diagnosing An RV Air Conditioner That Is Not Cooling - • Diagnosing An RV Air Conditioner That... • • Film Date: 8/8/2019 • Location: Hansville, WA • • Camera: • Samsung Galaxy Note8 • Native Camera • 16:9 FHD 1920x1080 • Version 9.0.01.38 • • Audio: • Samsung Galaxy Note8 • Native Microphone • • Music: • My RV Works-Jam • Composed by Steve Patry - Four Faces Band

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