Carrier PIC 5+ - Page 36

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Alm-229 ALM-221 Sensor Fault –
Common CHWR Temp
As above As above Check sensor resistance.
Check for proper wiring between Common CHWR Temp and IOB
connector.
Check for disconnected, grounded, or shorted wiring.
Alm-350 ALM-350 Sensor Fault - 19DV
1st Bearing Temp
As above As above Check sensor resistance.
Check for proper wiring between 19DV 1st Bearing Temp Sensor and
IOB connector.
Check for disconnected, grounded, or shorted wiring.
Alm-351 ALM-351 Sensor Fault - 19DV
2nd Bearing Temp
As above As above Check sensor resistance.
Check for proper wiring between 19DV 2nd Bearing Temp Sensor and
IOB connector.
Check for disconnected, grounded, or shorted wiring.

Alm-215 ALM-215 Sensor Fault -
Condenser Pressure
Automatic if the voltage
transmitted by the sensor
returns to normal
Unit shuts down Check condenser pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-216 ALM-216 Sensor Fault -
Evaporator Pressure
As above As above Check Evaporator pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-217 ALM-217 Sensor Fault -
Economizer Pressure
As above As above Check Economizer pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-218 ALM-218 Sensor Fault - Diuser
Pressure
As above As above Check Diuser pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-219 ALM-219 Sensor Fault - Oil
Sump Pressure
As above As above Check Oil Sump pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-220 ALM-220 Sensor Fault - Oil
Supply Pressure
As above As above Check Oil Supply pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connectors.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-225 ALM-225 Sensor Fault – Pump
Inlet Pressure
As above As above Check Pump Inlet pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connectors.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-226 ALM-226 Sensor Fault –
Bearing Inlet Pressure
As above As above Check Bearing Inlet pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connectors.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-227 ALM-227 Sensor Fault –
Bearing Outlet Pressure
As above As above Check Bearing Outlet pressure transducer wiring.
Conrm that 5 V reference signal is available between IOB connectors.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
Alm-352 ALM-352 Sensor Fault - 19DV
Pump Outlet Pressure
As above As above Check 19DV Pump Outlet Pressure transducer wiring. Conrm that
5 V reference signal is available between IOB connector.
Check for disconnected, grounded, or shorted wiring.
Check for condensation in transducer connector.
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Alm-230 ALM-230 Prestart Failure - High
Bearing Temperature
Manual Unit shuts down.
Compressor is not allowed
to start
Check Comp Bearing Temp in Temperature screen.
Check oil heater and oil cooler for proper operation.
Check for low oil level, partially closed oil supply valves, clogged oil
lters.
Check the Comp Bearing Temp sensor wiring and accuracy to IOB
connector.
Check Comp Bearing Temp Alert setting.
Alm-231 ALM-231 Prestart Failure - High
Motor Temperature
As above As above Check Comp Motor Wind Temp in Temperature screen.
Check motor temperature sensor for wiring and accuracy to IOB
connector.
Check motor cooling line and isolation valves for proper operation, or
r e s t r i c t i o n s , c h e c k r e f r i g e r a n t  l t e r / d r i e r.
Check for excessive starts within a short time span.
Check Comp Motor Temp Override setting.
Alm-232 ALM-232 Prestart Failure - High
Discharge Temp
As above As above Check Comp Discharge Temp in screen.
Allow compressor discharge temperature sensor to cool.
Check compressor discharge temperature sensor wiring and accuracy
to IOB connector.
Check for excessive starts.
Check COMP DISCHARGE ALERT setting.