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Table 11. CORE Control System Alarm and Event Codes
SELECTED ALARMS (MARKED WITH * IN TAbLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1).
ALARM
CODE
DISPLAY MESSAGE
EVENT ACTION
86*
CONFLICTING TSTAT INPUT
Check thermostat inputs for simultaneous heat and cooling wiring. Once condition is
corrected, unit controller will resume operation after error time off day has expired.
87
UNIT DIP SWITCH CHANGED
UNIT (equipment type) DIP switch has changed while unit is energized. Check UNIT DIP
switch setting and reset control. Make sure the UNIT DIP switch settings agree with the
unit type.
88
ECTO CHIP PROBLEM
This may indicate a problem with the ECTO chip.
89
UNIT ADDRESS NOT VALID
No address is set on unit address DIP switch SW3. Any one switch on SW3 must be in ON
position. SW3 is factory set with switch #2 in on position.
90
RAM ERROR
RAM error.
91*
OUTDOOR ENTHALPY SENSOR
•
If Enthalpy Sensor failure is detected, the system will disable ‘Free Cooling’
operation.
NOTE:
Valid Outdoor Enthalpy Sensor reading is required for both ‘ODE’ (Outdoor
Enthalpy) and ‘ODE differential’ (Outdoor differential). Valid Indoor Enthalpy
Sensor reading is required for ‘ODE differential’ (Outdoor differential).
•
Check economizer Parameters 160 and 161. Also check enthalpy Parameters 162
and 163.
•
Check sensor and wiring.
92*
INDOOR ENTHALPY SENSOR
If Enthalpy Sensor failure is detected, the system will disable ‘Free Cooling’ operation.
NOTE:
Valid Outdoor Enthalpy Sensor reading is required for both ‘ODE’ (Outdoor
Enthalpy) and ‘ODE differential’ (Outdoor differential). Valid Indoor Enthalpy
Sensor reading is required for ‘ODE differential’ (Outdoor differential).
Check wiring and test A62 sensor using specified method in M3 application guide, section
titled economizer checkout.
93*
BACKUP MODE
•
Check communication loss with network sensor or if CORE Unit Controller If
NETWORK INTEGRATION is set to RTU STANDALONE MODE and backup sensor
is set to RETURN AIR BACKUP.
•
While running in backup mode the unit controller will set this alarm. The unit controller
will return from Backup mode to Primary (Main) mode on a reset or after the Primary
mode (room Sensor is not in error or OR network communication is re-established
and available for 300 seconds.
•
Backup mode alarm will be cleared on the reset OR after the unit controller has
returned to primary (main) system mode.
94*
BAD ZONE SENSOR SETPOINTS
Ensure that the heating and cooling set points honor the auto-changeover deadband.
95
ECTO PARAMETER CHANGED
ECTO parameter has been changed by the CORE Service application,
96
FOUR-STAGE INTERFACE FAILURE
Four stage interface failure A138. ECTO 6.01 set to option 12 when no A138 board
present can also cause this alarm.
97
FOUR-STAGE CONFIGURATION
ERROR
Four stage interface A138 detected but ECTO 6.01 is not set to option 12 or equipment
type is set to heat pump.
98
ECTO MEMORY CHIP WRITE ERROR
ECTO memory chip write error.
99*
OAC ERROR
Check sensor and wiring. This alarm activates when the A24 sensor input signal is
continuously above 25% of sensor measuring range for more than five minutes with
blower stopped. The CORE Unit Controller will disable the Outdoor Air CFM control. The
alarm automatically clears when the sensor reading is below 10% sensor measuring range
for one minute.
100*
AIR VOL CONTROL SETUP ERROR
Check for proper installation of GP board and settings.
101*
MGV CONTROL SETUP ERROR
Check for proper installation of GP board and settings.
102*
GP CONTROL SETUP ERROR
Check for proper installation of GP board and settings.
103*
ADV CTRL SETUP ERROR
Check CORE Unit Controller Configuration ID 1 settings.
104
RESERVED
105
ECONOMIZER CONFIGURATION
ERROR
Economizer configuration error.
106*
BUILDING PRESS SENSOR
Check sensor and wiring.
