Carrier 19XL - Manual (Page 289)

* [LIMIT] is shown on the LID as the temperature, pressure, voltage, etc., set point predefined or selected
by the operator as an override, alert, or alarm condition. [VALUE] is the actual pressure, temperature,
voltage, etc., at which the control tripped.
Failure To
Start
Starter Transi-
tion Fault RUN AUX Starter Transition
Fault: Check 1CR/1M/Interlock
mechanism. Check starter for proper operation. Run
contact failed to close.
Failure To
Start
1CR AUX Con-
tact Fault 1CR AUX Starter Contact
Fault: Check 1CR/1M aux. con-
tacts. Check starter for proper operation. Start
contact failed to close.
Failure To
Start
Motor Amps Not
Sensed CA P Motor Amps Not Sensed:
Check motor load signal. Check for proper motor amps signal to
SMM. Check wiring from SMM to cur-
rent transformer. Check main motor cir-
cuit breaker for trip.
Failure To
Start
Check Refriger-
ant Type Current Refrigerant Properties
Abnormal — Check Selection of
refrigerant type Pressures at transducers indicate
another refrigerant type in Control Test.
Make sure to access the ATTACH TO
NETWORK DEVICE table after chang-
ing refrigerant type.
Failure To
Start
Low Oil Pressure Low Oil Pressure [LIMIT]:
Check oil pressure switch/
pump and 2C aux. The oil pressure differential switch is
open when the compressor tried to
START. Check the switch for proper
operation. Also, check the oil pump
interlock (2C aux) in the power panel
and the high condenser pressure
switch.
Table 10F — Start-Up Failures: This is an alarm condition. A manual reset is required
to clear. (Continued)
Primary
Message Secondary
Message Alarm Message/Primary
Cause
Additional Cause/Remedy