Carrier 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 80

Alarm 108 -- Cooler Flow Switch Setpoint Configuration
Failure _R90)
NOTE: Almm 108 is not used or supported. If this condition is
encountered, confirm machine configuration.
Alarm 109 -- Cooler Flow Switch Failure (R91 )
Criteria for Trip -- The criteria are tested when the unit is on
or off. This alann will be tripped when the unit is on if:
• The flow switch fails to close after the Off/On delay.
• If the master/slave control is active, the unit is the lag
chiller and if the cooler flow switch fails to close within
one minute after the cooler pump was restarted. The
alarm is ignored if the lag cooler pump is stopped as a
result of master/slave control.
• The flow switch is opened during normal operation.
The alarm will be tripped when the unit is off if:
• The cooler pump control is enabled (PUMP=0) and the
cooler flow switch is checked when the pump is enabled
(RLOC) and the cooler flow switch is closed after file cooler
pump is commended OFF for more than 2 minutes.
• The flow switch fails to close after the Off/On delay after
the cooler pump has been turned off to protect the cooler
from freezing (PUMP=0).
Action to be Taken -- For criteria for trip AI and A2, the com-
pressors will not be st_uted.
For criteria for trip A3, all compressors will be stopped wifllout
going through pumpdown. Cooler pump will be stopped with
no delay.
For criteria for trip BI, the unit will not start.
Reset Method -- Manual if at least one compressor is operat-
ing. Automatic if no compressors are operating.
Possible Causes -- If this condition is encountered, check the
following items:
• a faulty flow switch
• flow switch wiring
• Main Base Board for a faulty channel
Alarm 110 -- Service Maintenance Alert (Sl:nn)
CriWriafor Trip -- This alert is tested whether the unit is ON
or OFF and when file Servicing Alert decisions listed under
Time Clock--)MCFG have been enabled. The almm will be
generated if the one of the following configuration errors is
detected by the control. The "nn" refers to the error code listed
in Table 42.
Table 42 -- Service Maintenance Alert Codes
CODE DESCRIPTION
Sr-01 Circuit A Loss of Refrigerant Charge
Sr-02 Circuit B Loss of Refrigerant Charge
Sr-03 Circuit C Loss of Refrigerant Charge
Sr-04 Water Loop Size Warning
Sr-05 Air Exchanger Cleanliness Warning
Sr-06 Cooler Pump 1 Servicing Required
Sr-07 Cooler Pump 2 Servicing Required
Sr-08 Condenser Pump 1 Servicing Required
Sr-09 Condenser Pump 2 Servicing Required
Sr-10 Water Filter Servicing Required
Sr-11 Compressor A Oil Filter Servicing Required
Sr-12 Compressor B Oil Filter Servicing Required
Sr-13 Compressor C Oil Filter Servicing Required
Action m be Taken -- None.
Reset Method-- Manual, after the service has been completed.
Possible Causes -- If the Sr-01, 02, or 03 conditions me
encountered, check the following items:
• sensor wiring to the Main Base Board
• sensor for accuracy
Compressor Motor Temperature Too High
Almm 111-01 -- Circuit A (A1.01 )
Almm 112-01 -- Circuit B (B 1.01 )
Almm 113-01 --Circuit C (CI.01)
CriWria .for Trip -- The alarm criteria me checked when the
compressor is ON. This alarm will be generated if:
• The temperature is greater than 250 F (121 C) and it has
been greater than 212 F (100 C) for 10 consecutive
seconds.
• The compressor temperature is greater than 232 F
(111 C) for 90 seconds (but less than 250 F [121 C]).
Action to be _iken -- The circuit shuts down immediately.
Reset Method -- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• faulty wiring and loose plugs
• faulty CPM board
Compressor Motor Temperature Out of Range
Alarm 111-02 -- Circuit A (A1.027
Almm 112-02 --Circuit B (BI.02)
Almm 113-02- Circuit C (C 1.027
Criteria .for Trip -- The alarm criterion is checked when the
compressor is ON. This alarm will be generated if: the temper-
ature is greater than 250 F (121 C) and it has NOT been greater
than 212 F (100 C) for 10 consecutive seconds.
Action to be _ken -- The compressor will be stopped.
Reset Method -- Manual
Possible Causes -- ff this condition is encountered, check the
following items:
• faulty compressor temperature thermistor
• faulty wiring and loose plugs
• faulty CPM board
Compressor High Pressure Switch Protection
Almm 111-03 -- Circuit A (A1.03)
Almm 112-03 --Circuit B (BI.03)
Almm 113-03 --Circuit C (C 1.03)
Criteria.for Trip -- The alarm criterion is checked when the
compressor is ON. This alarm will be generated if the circuit
high-pressure switch (HPS) opens for more than 200 ms (milli-
seconds). The CPM board monitors the HPS switch.
A_Tion to be _ken -- The compressor will be stopped.
Reset Method -- Manu_fl
Possible Causes -- ff this condition is encountered, check the
following items:
• condenser fan or contactor failure of loss of condenser air
flow
• compressor operating beyond the operation envelope
• faulty high pressure switch or wiring
• faulty CPM board
Compressor Overcurrent
Almm 111-04 -- Circuit A (A1.04)
Almm 112-04 --Circuit B (BI.04)
Almm 112-04 -- Circuit C (C 1.04)
CriWria.for Trip -- The alarm criterion is checked when the
compressor is ON. This _flmm will be generated if the CPM
bomd detects a high motor current compared with the MTA
(must trip amps) setting for more than 1.7 seconds.
A_tion to be Taken -- The compressor will be stopped.
Reset Method -- Manu_d
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