- WattMaster Water Source Heat Pump Operations Manual

WattMaster WHP Section 4
Start-Up and Troubleshooting 4-21
5.0 Troubleshooting
5.1 General Troubleshooting
The following is a guide to assist in troubleshooting the WattMaster WHP System. It is
provided as a systematic approach to determining and resolving common system
problems.
5.1.1 Communications Troubleshooting Checklist
No WHP or Loop Controller Units are Communicating
• Is the CommLink II connected and plugged in?
• Is the CommLink II installed, a single or multiple loop version. A jumper in the
CommLink can be set for “Single” or “Multi”. On the WHP system is considered a
Multiple Loop version and the CommLink jumper must be set on Multi.
• Are Comm Loop voltages correct? See the Comm Loop troubleshooting guides.(page
4-24)
• Is the Comm Loop open or shorted?
• Is the CommLink II connected and plugged in?
• Is the MiniLink Voltage correct?
• Are the WHP and Loop Controller address switches set correctly? See the addressing
chart. (WHP Loop Controller should always be set to address 30, see Figure 4-10)
• Is the MiniLink address switch set correctly? See the addressing chart.(see Figure 4-
10)
• Are the WHP and Loop Controllers powered? Check 24 VAC to the controllers.
• Is the System Manager connected to the Local Communications loop?
Some WHP Units are communicating but others are not:
• Are the WHP Controller address switches set correctly? See the addressing chart.
• Is the WHP Loop Controller address switch set correctly? See the addressing chart.
• Are the WHP Controllers and Loop Controller powered? Check 24 VAC to the
controllers.
• Is the REC LED on the missing WHP Controller “flickering”? See WHP Controller
introduction for location of the REC LED. (see Figure 4-4)
• Is the COMM LED on the WHP Controller blinking an error code? See the Blink
Code chart. (see Figure 4-6)
• Are Comm Loop voltages correct at the missing unit? See Comm Loop troubleshoot-
ing guide starting on page 4-24.