Warning Codes (Green Led Flash Code); Alert/Lockout Codes (Red Led Flash Code) - Carrier AquaSnap 30MPA Series Controls, Start-Up, Operation, Service, And Troubleshooting

The CoreSense communications module has field configu-
rable DIP switches for addressing and configuring the module.
The DIP switches should be addressed as shown in Table 52.
The CoreSense communication module has a green and a
red light-emitting diode (LED). A solid green LED indicates
the module is powered and operation is normal. A solid red
LED indicates an internal problem with the module. If a solid
red LED is encountered, power down the module (interrupt the
T1-T2 power) for 30 seconds to reboot the module. If a solid
red LED is persistent, change the CoreSense module.
The CoreSense module communicates warning codes via a
green flashing LED. Warning codes do not result in a trip or
lockout condition. Alert codes are communicated via a red
flashing LED. Alert codes will result in a trip condition and
possibly a lockout condition. See wiring diagram on terminal
box cover, or Fig. 41. The flash code corresponds to the num-
ber of LED flashes, followed by a pause, and then the flash
code is repeated. A lockout condition produces a red flash, fol-
lowed by a pause, a solid red, a second pause, and then repeat-
ed. Table 53 lists the flash code information for Warning and
Alert codes along with code reset and troubleshooting
information.
LEDS
DIP SWITCHES
1 2 3 4 5 6 7 8 9 10
T2 T1 L1
MODULE
POWER
Fig. 41 — CoreSense Communication Motor
Protection Wiring

Warning Codes (Green LED Flash Code):

• Code 1 – Loss of Communication: The module will flash
the green Warning LED one time indicating the module
has not communicated with the master controller for lon-
ger than 5 minutes. Once communication is reinitiated,
the Warning will be cleared. The 30MP units do not sup-
port the communication capability of this module.
• Code 2 – Reserved For Future Use
• Code 3 – Short Cycling: The module will flash the green
Warning LED three times indicating the compressor has
short cycled more than 48 times in 24 hours. A short
cycle is defined as compressor runtime of less than 1
minute. The Warning will be activated when the "Short
Cycling" DIP Switch (no. 10) is OFF (in the down posi-
tion). When fewer than 48 short cycles are accumulated
in 24 hours the Warning code will be cleared.
• Code 4 – Open/Shorted Scroll Thermistor: The module
will flash the green Warning LED four times, indicating
that the scroll NTC thermistor has a resistance value that
indicates an open/shorted thermistor. The Warning will
be cleared when the resistance value is in the normal
range. The 30MP units do not utilize a scroll thermistor.
• Code 5 – Not used.

Alert/Lockout Codes (Red LED Flash Code):

• Code 1 – Motor High Temperature: The module will
flash the red Alert LED one time indicating the motor
MOTOR THERMAL
SENSORS
R
JUMPER
G
COMMUNICATION
PORT
M2 M1
L2 L3
CONTROL CIRCUIT
CONNECTIONS
COMPRESSOR PHASE
SENSING
A38-7314
PTC circuit has exceeded 4500 .. A Code 1 Alert will
open the M2-M1 contacts. The Alert will reset after 30
minutes and the M2-M1 contacts will close if the resis-
tance of the motor PTC circuit is below 2750 .. Five
consecutive Code 1 Alerts will lock out the compressor.
Once the module has locked out the compressor, a power
cycle will be required for the lockout to be cleared.
• Code 2 – Open/Shorted Motor Thermistor: The module
will flash the red Alert LED 2 times indicating the motor
PTC thermistor circuit has a resistance value greater than
220  or less than 100 . that indicates an open/shorted
thermistor chain. A Code 2 Alert will open the M2-M1
contacts. The Alert will reset after 30 minutes and the
M2-M1 contacts will close if the resistance of the motor
PTC circuit is back in the normal range. The module will
lock out the compressor if the trip condition exists for
longer than 6 hours. Once the module has locked out the
compressor, a power cycle will be required to clear the
lockout.
• Code 3 – Short Cycling: The module will flash the red
Alert LED 3 times indicating the compressor is locked
out due to short cycling. A Code 3 Alert will open the
M2-M1 contacts. Code 3 will be enabled when the Short
Cycling DIP switch (no. 10) is ON (in the up position)
and the compressor has exceeded the number of short
cycles configured by the user in a 24-hour period. Once
the module has locked out the compressor, a power cycle
will be required to clear the lockout.
• Code 4 – Scroll High Temperature: The module will
flash the red Alert LED 4 times indicating the scroll NTC
circuit is less than 2400 .. A Code 4 Alert will open the
M2-M1 contacts. The Alert will reset after 30 minutes
and the M2-M1 contacts will close if the resistance of the
scroll NTC circuit is higher than 5100 .. The module
will lock out the compressor if the number of Code 4
Alerts exceeds the user configurable number of Code 4
events within a 24-hour period. Once the module has
locked out the compressor, a power cycle will be
required to clear the lockout.
• Code 5 – Not used.
• Code 6 – Missing Phase: The module will flash the red
Alert LED 6 times indicating a missing phase in one of
the three leads to the compressor. A Code 6 Alert will
open the M2-M1 contacts. The Alert will reset after 5
minutes and the M2-M1 contacts will close if the missing
phase condition is not present. The module will lock out
the compressor after 10 consecutive Code 6 Alerts. Once
the module has locked out the compressor, a power cycle
will be required to clear the lockout.
• Code 7 – Reverse Phase: The module will flash the red
Alert LED 7 times indicating a reverse phase in two of
the three leads to the compressor. A Code 7 Alert will
open the M2-M1 contacts. The module will lock out the
compressor after one Code 7 Alert. A power cycle will
be required to clear the lockout.
• Code 8 – Not used.
• Code 9 – Module Low Voltage: The module will flash
the red Alert LED 9 times indicating low module volt-
age, less than 18 vac on the T2-T1 terminals for more
than 5 seconds. A Code 9 Alert will open the M2-M1
contacts. The Alert will reset after 5 minutes and the M2-
M1 contacts will close if the T2-T1 voltage is above the
reset value in 18 to 30 vac.
Resetting Alert codes can be accomplished manually by cy-
cling power to the module (disconnect T2 or T1 for 5 seconds).
If the fault that initiated the Alert code is absent after the reset
is performed, the Alert code will be cleared and CoreSense
module will allow normal operation. If the fault is still present
after the reset is performed, the fault code will continue to be
displayed via the green or red flashing LED.
57