Page 44 of 97 PN: 106417-05
8.5 “No Communication” Troubleshooting Trees
8.5.1 General Troubleshooting
Whenever a setting is changed (i.e. dipswitches or communication) power should be cycled to the
ProtoNode to allow for settings to take effect.
1. Is power connected to boilers and ProtoNode?
• Green PWR LED solid on ProtoNode
• Green LED solid on control
2. Is the ERR LED red? (see Section 8.4)
3. Is the wiring from the ProtoNode to the Boilers correct? (See Sections 3.3 – 3.12)
4. Does each boiler have a unique address? (see Section 2.1)
5. For TSBC/SBC boilers, are the Parity and Baud rate set correctly? (see Section 2.1.3)
6. Does the ProtoNode Discover boilers but give zero for values?
• The ProtoNode has remembered older profiles and must be cleared.
• Connect a PC using an Ethernet cable.
• Go to 192.168.1.24 ProtoNode profile internet explorer page
• Select “Clear Profiles And Restart”
For further “No Communication” Troubleshooting, go to the Network Protocol of the EMS Network
and follow the Troubleshooting tree under it.
8.5.2 LonWorks troubleshooting
1. Is the wiring to the EMS Network Correct? (See Section 4.2)
2. Has an Auto-Discovery been performed? (See Section 2.2.2)
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