Troubleshooting
Table 6: N2 Bus Configuration Troubleshooting
Error/Trouble
Condition
Possible Causes
Solution
Two or more controllers have the same
address.
Change each duplicate address to a unique
number.
TEC2104-1 cycles
online and offline.
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)
.
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.
TEC2104-1 does not have power.
Apply power to the TEC2104-1.
N2 cable runs are broken.
Locate and correct the wiring.
TEC2104-1 does not
come online.
Device type is incorrect.
TEC2104-1 address must be VND device type.
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.
Entire N2 Bus is offline.
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 displays at the headend control should the setpoint not be reached
within 45 minutes (there is no indication locally at the TEC1204-1).
18
TEC2104-1 Networked Multi-Stage Economizer Thermostat Installation Instructions
