Carrier 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 81

Possible Causes -- If this condition is encountered, check the
following items:
• Compressor operating beyond the operation envelope.
• Incorrect MTA setting.
Compressor Locked Rotor
Almm 111-05 -- Circuit A (A1.05)
Almm 112-05 --Circuit B (B 1.05)
Almm 113-05 -- Circuit C (C1.05)
Criteria .fbr Trip -- The _flmm criterion is checked during
stall-up when the compressor is ON. This tdarm will be gener-
ated if the CPM board detects a high motor current compared
with the MTA (must trip alnps) setting for more than 450 ms.
Action to be _iken -- The compressor will be stopped.
Reset Method -- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• compressor mechanical f:filure
• unloader slide valve failure
• compressor motor failure
Compressor Phase Loss
Almm 111-06 -- Circuit A
Almm 112-06- Circuit B
Almm 113-06 -- Circuit C
Almm 111-07 -- Circuit A
Almm 112-07 -- Circuit B
Almm 113-07- Circuit C
Almm 111-08 -- Circuit A
Almm 112-08- Circuit B
Almm 113-08- Circuit C
LI (AI.06)
LI (BI.06)
LI (C1.06)
L2 (A 1.07)
L2 (B1.07)
L2 (C1.07)
L3 (A 1.08)
L3 (BI.08)
L3 (C1.08)
CriWria .fbr Trip -- The alarm criteria are checked during
startup when the compressor is ON. This _darm will be gener-
ated if:
• The current unbalance on any of the 3 phases is greater than
65% for more than 1 second continuously during start-up.
• The current unbalance on any of the 3 phases is greater
than 65% for more than 200 ms continuously during
runtime.
Action to be _iken -- The compressor will be stopped.
Reset Method -- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• power failure
• blown fuse or tripped circuit breaker
• power wiring errol_ or loose termin_fls
Compressor Low Current
Almm 111-09 -- Circuit A (A1.09)
Almm 112-09- Circuit B (B 1.09)
Almm 113-09 -- Circuit C (C1.09)
Cl4wria ._br Trip -- The alarm criteria me checked when the
compressor is ON. This alarm will be generated if:
• The current is less than 15% MTA on all three legs for
more than 450 ms for Wye-Delta start units.
• If the current is less than 15% of MTA on all three legs
for more than 1 second for direct start units.
Action to be _ken -- The compressor will be stopped.
Reset Method -- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• power failure
• blown fuse or tripped circuit breaker
• deenergized contactor
• faulty current toroid
Compressor Wve-Delta Starter Current Increase Failure
Almm 111-10 -- Circuit A (AI. 10)
Almm 112-10 -- Circuit B (B 1.10)
Almm 113-10 -- Circuit C (CI.10)
Criteria ._br Trip -- The almm criterion is checked during
compressor start-up. This almm will be generated if the current
in Delta mode is not more than 25% greater than the cunent in
Y mode within 550 ms.
Action to be _ken -- The compressor will be stopped.
Reset Method-- Manual
Pos,ffble Causes -- If this condition is encountered, check the
following items:
• power supply failure to the delta contactor
• faulty wiring to the delta contactor
• faulty CPM board
• faulty current toroid
Compressor Contactor Failure
Alarm 111- 11 -- Circuit A (A 1.11 )
Alarm 112-11 -- Circuit B (B 1.11 )
Alarm 113-11 -- Circuit C (C 1.11 )
CriWria ._br Trip -- The almm criterion is checked during
compressor shut-down. This alarm will be generated if the cur-
rent is greater than 15% of the MTA on at least one phase for
10 continuous seconds.
Action to be _ken -- The compressor will be stopped.
Reset Method-- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• faulty or welded contactor
• faulty wiring
• faulty CPM board
Compressor Unable to Stop Motor
Alarm 111-12 -- Circuit A (A 1.12)
Alarm 112-12-- Circuit B (131.12)
Alarm 113-12 -- Circuit C (C 1.12)
Criwria ._br Trip -- The almm criterion is checked during
compressor shut-down. This alarm will be generated if aller
three attempts to turn off the compressor outputs and the cur-
rent is still greater than 15% of the MTA on at least one phase
for 10 continuous seconds.
Action to be _ken -- The compressor will be stopped.
Reset Method-- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• faulty or welded contactor
• faulty wiring
Compressor Phase Reversal
Alarm 111-13 -- Circuit A (A 1.13)
Alarm 112-13- Circuit B (BI.13)
Alarm 113-13 -- Circuit C (C 1.13)
CriWria ,fbr Trip -- The almm criterion is checked during
compressor st_ut-up. This alarm will be generated if the CPM
board detects a phase reversed from the cunent toroid.
Action to be _ken -- The compressor will be stopped.
Reset Method-- Manual
Possible Causes -- If this condition is encountered, check the
following items:
• if power supply lead at the terminal block is not operating at
the correct phase
• if power supply is crossed when going through the current
toroid
Compressor MTA Configuration Fault
Alarm 111-14 -- Circuit A (A 1.14)
Alarm 112-14 -- Circuit B (131.14)
Alarm 113-14 -- Circuit C (C 1.14)
C;4teria_sr Trip -- The _dmm criterion is checked whether the
compressor is ON or OFF. This alarm will be generated if the
MTA setting is out of the allowed MTA range.
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