Carrier 19XL - Manual (Page 286)

* [LIMIT] is shown on the LID as temperature, pressure, voltage, etc., predefined or selected by the
operator as an override or an alert.
Table 10D — Prestart Alerts: These alerts only delay start-up. When alert is corrected,
the start-up will continue. No reset is necessary.
Primary Message Secondary Message
Alarm Message/Primary
Cause Additional Cause/
Remedy
Prestart Alert Starts Limit Exceeded STARTS EXCESSIVE Com-
pressor Starts (8 in 12 hours) Depress the RESET softkey
if additional start is required.
Reassess start-up require-
ments.
Prestart Alert High Motor Tempera-
ture MTRW VALUE exceeded limit
of [LIMIT]*. Check motor tem-
perature. Check motor cooling line for
proper operation. Check for
excessive starts within a short
time span.
Prestart Alert High Bearing Tempera-
ture MTRB VALUE exceeded limit of
[LIMIT]*. Check thrust bearing
temperature. Check oil heater for proper
operation, check for low oil
level, partially closed oil sup-
ply valves, etc. Check sensor
accuracy.
Prestart Alert High Discharge Temp CMPD VALUE exceeded limit of
[LIMIT]*. Check discharge tem-
perature. Check sensor accuracy. Allow
discharge temperature to
cool. Check for excessive
starts.
Prestart Alert Low Refrigerant Temp ERT VALUE exceeded limit of
[LIMIT]*. Check refrigerant tem-
perature. Check transducer accuracy.
Check for low chilled water/
brine supply temperature.
Prestart Alert Low Oil Temperature OILT VALUE exceeded limit of
[LIMIT]*. Check oil temperature. Check oil heater power, oil
heater relay. Check oil level.
Prestart Alert Low Line Voltage V P VALUE exceeded limit of
[LIMIT]*. Check voltage supply. Check voltage supply. Check
voltage transformers. Consult
power utility if voltage is low.
Adjust voltage potentiometer
in starter for SMM voltage
input.
Prestart Alert High Line Voltage V P VALUE exceeded limit of
[LIMIT]*. Check voltage supply. Check voltage supply. Check
voltage transformers. Consult
power utility if voltage is low.
Adjust voltage potentiometer
in starter for SMM voltage
input.
Prestart Alert High Condenser Pres-
sure CRP VALUE exceeded limit of
[LIMIT]*. Check condenser
water and transducer. Check for high condenser
water temperature. Check
transducer accuracy.