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