Carrier HS070-160 - Manual (Page 9)

Table 7 Display Codes
OPERATING MODES
Display Description
Comp Al Al Failure
Failure
C o m p Failure
Comp B 2 Failure
Loss of charge circuit A
Loss of charge circuit B
Low cooler flow
Low oil pressure circuit A
low oil pressure circuit B
Freeze protection
High suction superheat circuit A
High suction superheat circuit
B
Low suction suoerheat circuit A
Low suction superheat circuit B
Leaving water thermistor failure
Entering water thermistor failure
Cooler thermistor failure circuit A
Cooler thermostor failure circuit B
Comp thermistor failure circuit A
Comp thermistor failure circuit B
Reset thermistor failure
ALARMS
Action
Taken
Control
Circuit A shut off
Comp shut off
Circuit B shut off
Comp shut off
Circuit A shut off
Circuit B shut off
Unit shut off
Circuit A shut off
Circuit B shut off
Unit shut off
Circuit A shut off
Circuit B shut off
Circuit A shut off
Circuit
shut off
Unit shut off
Use default value
Circuit A shut off
Circuit B shut off
Circuit A shut off
Circuit B shut off
Stop reset
Reset
Method
M a n u a l
M a n u a l
M a n u a l
M a n u a l
M a n u a l
M a n u a l
M a n u a l
M a n u a l
m a n u a l
Auto.
M a n u a l
M a n u a l
M a n u a l
M a n u a l
Auto.
Auto.
Auto.
Auto.
Auto.
Auto.
Auto.
Probable Cause
High pressure switch trip or high discharge gas temp
switch trip, on when it is not supposed to be on. Wiring
error between electronic control and compressor relay.
Low refrigerant charge, or loss of charge pressure switch
failure.
No cooler flow or reverse cooler flow
Oil pump failure or low oil level, or switch failure.
Low cooler flow
Low charge or EXV failure, or plugged filter drier.
EXV failure cooler thermistor error.
Thermistor failure, or wiring error, or thermistor not
connected to input terminals.
NOTES:
1. Freeze protection trips at 35 F (1.7 C) for water and 6 degrees F (3.3 degrees C) below set point
for brine units. Resets at 6 degrees above set point.
2. All auto. reset failures that cause the unit to stop will restart the when the error has been
corrected.
3. All manual reset errors must be reset by moving the control switch to STANDBY then to RUN.
4. Valid resistance range for thermistors is 363,000 ohms to 216 ohms.
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