TEC2102-3 N2 Networked Heat Pump Thermostat Installation Instructions
16
Table 5: Troubleshooting Details
Error/Trouble
Condition
Possible Cause
Solution
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 on the N2 Bus, or the
repeater has lost power or is wired incorrectly.
Refer to the
N2 Communications Bus Technical
Bulletin (LIT-636018)
.
Thermostat Does
Not Come Online
Two or more controllers have the same address.
Change each duplicate address to a unique
number.
The N2 Bus contains too many devices.
Do not exceed the maximum number of devices
allowed on the N2 Bus per supervisory controller
limitations.
The thermostat does not have power.
Apply power to the thermostat.
The N2 cable runs are broken.
Locate the break and correct the wiring.
The thermostat device type is incorrect.
Change the thermostat device type to VND.
N2 Bus is Offline
The wiring on the N2 Bus is broken.
Repair the wiring.
No point mapping has been entered.
Define the BAS dataset.
Table 6: Display Messages
Display
Function
Frost ON
Indicates that heating is energized by the low limit frost protection room temperature setpoint.
Service
Indicates that there is a service alarm in accordance with the programmable Digital Inputs (DI1 or DI2).
Filter
Indicates that the filter(s) is dirty in accordance with the programmable Digital Input (DI1 or DI2).
