Carrier PC211 Table 10K Machine Protect Limit Faults

Table 10K — Machine Protect Limit Faults
Primary
Message Secondary Message Alarm Messag e/ Primary Cause Additional Cause/R eme dy
Protective
Limit
High Discharge
Temp CMPD [VALUE] exceeded limit of
[LIMIT]*. Check dis-
charge temperature.
Check discharge tempera ture immedi-
ately. Check sensor for accuracy; check
for proper condenser f low and tempera-
ture; check oil re servoir temperature.
Check condenser for fouled tubes or air i n
machine. Check for prop er guide vane
actuator operation.
Protective
Limit
Low Refrigerant
Temp ERT [VALUE] exceed limit of [LIMIT]*. Check
evap pump and flow
switch.
Check for proper am ount of refrigerant
charge; check for pr oper water flow and
temperatures. Check fo r proper guide
vane actuator operati on.
Protective
Limit
High Motor Temper-
ature MTRW [VALUE] exceeded limit of
[LIMIT]*. Check motor
cooling and solenoid.
Check motor tempera ture immediately.
Check sensor for accuracy. Check for
proper condenser flow and temperature.
Check motor cooling system for restric-
tions. Check motor c ooling solenoid for
proper operation. C heck refrigerant filter.
Protective
Limit
High Bearing Tem-
perature MTRB [VALUE] exceeded limit of
[LIMIT]*. Check oil cool-
ing control.
Check for throttle d oil supply isolation
valves. Valves should be wide open.
Check oil cooler thermal expansion val ve.
Check sensor accuracy. Check journal
and thrust bearings. Check refrigerant fil-
ter. Check for excessive oil sump level.
Protective
Limit
Low Oil Pressure OILPD [VALUE]
exceeded limit of
[LIMIT]*. Check oil pump
and transducer.
Check power to oil pump an d oil level.
Check for dirty filters or oil foaming at
start-up. Check for thermal overload cut-
out. Reduce ramp load rate if foaming
noted.
Note: This alarm is not related to pr essure
switch problems.
Protective
Limit
No Motor Current CA P Loss of Motor Cur-
rent: Check sensor. Check wiring: Check torque setting on solid state starter. Check for main circuit
breaker trip. Check power supply to PSIO
module.
Excessive numbers of the sa me fault can lead to seve re ma chine damage.
Seek service exp ertise.
WARNING !WARNING