TEC2103-2 Networked Multi-Stage Thermostat Installation Instructions
17
Troubleshooting
Table 6: N2 Bus Configuration Troubleshooting
Error/Trouble
Condition
Possible Causes
Solution
TEC2103-2 thermostat
cycles online and
offline.
Two or more controllers have the same
address.
Change each duplicate address to a unique
number.
There are Y or T taps or the repeater lost
power or is wired incorrectly.
Refer to the
N2 Communications Bus Technical
Bulletin (LIT-636018)
.
TEC2103-2 thermostat
does not come online.
Two or more controllers have the same
address.
Change each duplicate address to a unique
number.
N2 Bus contains too many devices.
The maximum of N2 devices allowed on the
N2 Bus is as follows: 100 devices per NCM,
32 devices per N30, 32 devices per N31,
150 devices per the Companion/Facilitator
system.
TEC2103-2 thermostat does not have
power.
Apply power to the TEC2103-2 thermostat.
N2 cable runs are broken.
Locate and correct the wiring.
Device type is incorrect.
TEC2103-2 thermostat address must be VND
device type.
Entire N2 Bus is offline.
EOL jumpers on MM-CVT101 or NCM are
not installed.
Install EOL jumpers properly.
MM-CVT101 is not plugged into the
Personal Computer (PC) or 120 VAC
source.
Plug MM-CVT101 into PC or plug it into a
120 VAC source.
Wiring near the Bus is broken.
Repair the wiring.
No point mapping entered.
Define the BAS dataset.
Table 7: Alarm Messages
Display
Function
Frost ON
Indicates heating is energized by the low limit frost protection (42
°
F [5.5
°
C]).
Service
Indicates there is a service alarm in accordance with one of the programmable Digital
Inputs (DI1 or DI2).
Filter
Indicates the filter (or filters) are dirty in accordance with one of the programmable
Digital Inputs (DI1 or DI2).
Note:
There is a temperature alarm message that appears at the headend control should the setpoint not be reached
within 45 minutes (there is no indication locally at the TEC2103-2 thermostat).
