3. High temperature at sensor. See chart. SWT, RWT, OAT input voltage reads too high 1. Check for open circuit wiring errors. 2. Defective sensor. Check using the chart. 3. Low temperature at sensor. See chart. LPR (when optional 0-5VDC Loop Pressure Sensor is used) input voltage reads too low. 1. Check for shorts or other wiring errors. 2. Defective Sensor. Check using the chart. 3. High pressure at sensor. See chart. LPR (When Loop Pressure Switch is used) input voltage reads too high. 1. Chec

Start-Up and Troubleshooting This document is subject to change without notice. WattMaster Controls, Inc. assumes no responsibility for errors, or omissions herein. WHP Installation & Operations Manual - Form WM-WHP-IO-02A Copyright 2004 WattMaster Controls, Inc. All rights reserved. Section 1 Table of Contents Conventions .....................................................................1 General Information.........................................................2 Water Source Heat Pump Uni