Table 8 — LID Primary and Secondary Messages and Custom Alarm/Al ert Messages with Troubleshooting Guides
K. Machine Protect Limit Faults Primary
Message Secondary
Message Alarm Messa ge/
Primary Cause Additional Cause/ Rem edy
Protective
Limit
High Discharge
Temp CMPD [VALUE] exceeded
limit of [LIMIT]*. Check dis-
charge temperature.
Check discharge tem perature immedi-
ately. Check sensor for accuracy; check
for proper condenser fl ow and tempera-
ture; check oil rese rvoir 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] exceeded
limit of [LIMIT]*. Check
evap pump and flow switch.
Check for proper amo unt of refrigerant
charge; check for pro per water flow and
temperatures. Check fo r proper guide
vane actuator opera tion.
Protective
Limit
High Motor Temper -
ature MTRW [VALUE] exceeded
limit of [LIMIT]*. Check
motor cooling and solenoid.
Check motor temperat ure immediately.
Check sensor for accuracy. Check for
proper condenser flow and temperature.
Check motor cooling system for restric-
tions. Check motor co oling solenoid for
proper operation. Check refrigerant filter.
Protective
Limit
High Bearing Tem-
perature MTRB [VALUE] e xceeded
limit of [LIMIT]*. Check oil
cooling control.
Check for throttled oil supply isolation
valves. Valves should be wide open.
Check oil cooler thermal expansi on valve.
Check sensor accura cy. 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 is not related to pressure
switch problems.
Excessive numbers of the same fau lt can lead to severe machine d amage. Seek serv ice expertise.
WARNING !WARNING