Lennox NTC1-1-Kit User Manual

Page 12
Table 10. NTC Controller Parameters
Control
No
Parameter Name
Control Value
Units Description
Min Def Max
A4.13 DACC_SP 40 55 80 Deg. F Discharge air control cooling setpoint.
A4.14 DACC_Stg_DB 5 5 20 Deg. F Discharge air control cooling stage deadband.
A4.15 DACC_StgUp_Dly 0 180 900 Sec Discharge air control cooling stage−up time delay.
A4.16 DACC_StgDn_Dly 0 120 600 Sec Discharge air control cooling stage−down time delay.
A4.17 DACC_Stg_diff 2 2 20 Deg. F Discharge air control cooling stage differential.
Error Codes
The NTC error codes can be viewed using a PC, Unit Controller PC software (version 2.02), and a PC to L Connection
converter. Refer to Adjust Parameters” section and “Table 1. Heartbeat LED” on page 3.
Table 11. NTC Error Codes
Error
#
Issue Action
2
ECTO access error. This may indicate a problem with the ECTO
memory chip and parameters may not be changeable.
Controller will operate with factory ECTO defaults.
4 N.O. input indicates smoke alarm.
Unit is off for ve minutes or until smoke alarm reset
(N.O. input turns off)
5
Airow switch. This indicates no blower air after 20 seconds (ECTO A4.05)
after G output is energized.
Unit off. Will retry in 5 minutes.
6 Dirty lter. Service input indicates a dirty lter. Alarm only. No other action taken.
40 Return air temperature exceeded heating limit set in ECTO A1.10. Heating outputs off until RAT is back within limits.
41 Return air temperature cooling exceeded cooling limit set in ECTO A2.11. Cooling outputs off until RAT is back within limits.
73
Network fails to send remote zone sensor data within 5 minute win- dow.
Cleared by reset or when missing network data is received.
Local zone sensor data is used if it is available. If a local
sensor is not installed, the RAT sensor is used (if installed). If
the local and RAT sensor data is not available the unit is off.
74 Zone sensor problem. Check wiring and sensor.
Controller will switch over to the return air sensor, if present.
Otherwise unit off until sensor is back in range.
75 Outdoor air temperature sensor problem. Check wiring and sensor.
Compressor low ambient and HP supplemental heat lock−
out functions are disabled until sensor is back in range.
77
Discharge (supply) air temperature sensor (RT6) problem. Check wiring
and sensor. Can only occur when ECTO A4.07 is 2.
Unit off.
78 Return air temperature sensor problem. Check wiring and sensor.
Return air limit functions disabled until sensor is back in
range.
82 Controller reset or power outage. Indication only. No action taken.
87
Equipment conguration DIP switch has changed while unit is energized.
Check DIP switch settings and reset controller. Make sure the DIP switch
settings agree with the unit type.
Unit off until reset or DIP is changed back to original set- ting.
88 May indicate a problem with the ECTO chip. Controller will operate with factory ECTO defaults.
90 RAM memory error. Controller will reset.
94 Setpoint temperature is out of range.
Reverts to 65°F (18°C) heating and 80°F (27°C) cooling until
setpoint is back in range.
110
Waiting for network zone sensor data for up to 5 minutes following reset.
Clears when network data is received.
Unit off.
127 Alarms buffer overow. Not all alarms stored.
200 Service input is on. Alarm only.
201 Normally open (N.O.) input is on.
Unit off. Will retry every 5 minutes.202 Normally closed (N.C.) input is off.
203 Blower overload (N.C. input) tripped.
204 Loss of phase. (N.C. input) tripped.
Unit off for 5 minutes or until loss of phase device is reset
(N.C. input is on.)
205 Airow switch tripped three times. Unit is locked off until controller is reset.
206 Controller has lost communication from the master controller.
Controller switches to the backup setpoints and occupied
mode until communication link is re−established.

Lennox NTC1-1-Kit Specifications

General

Brand	Lennox
Model	NTC1-1-Kit
Category	Controller
Language	English