![background image](http://html1.mh-extra.com/html/carrier/69nt40-561-019/69nt40-561-019_operation-and-service-manual_2563845061.webp)
4–35
T-359
AL24
Compressor
IP
Compressor internal
protector (IP) is open.
Compressor
Shut down unit discon-
nect power, & check re-
sistance of compressor
windings at contactor T1-
T2, T2-T3.
Monitor unit, if alarm re-
mains active or is repeti-
tive replace the
compressor at the next
available opportunity,
refer to COMPRESSOR
Service
AL25
Condenser
IP
Condenser fan motor
internal protector (IP)
is open.
Insufficient Air
Flow
Shut down unit and
check condenser fan for
obstructions.
Remove obstructions.
Condenser Fan
Motor
Shut down unit, discon-
nect power, & check
Condenser Fan Motor IP
at plug connection
pins 1 & 2.
Replace defective con-
denser fan motor, refer to
Condenser Fan Motor As-
sembly Service
.
AL26
All Sensors
Failure: Sup-
ply/Return
Probes
Sensors out of range.
All sensors. detect-
ed as out of range
Perform Pre-trip P5:
If P5 passes, no further ac-
tion is required.
If P5 fails, replace the de-
fective sensor as deter-
mined by P5, refer to
TEMPERATURE SEN-
SOR Service
AL27
Analog to
Digital Accu-
racy Failure
Controller AD
converter faulty.
Controller
Power cycle the unit. If
the alarm persists, it indi-
cates a defective micro-
processor.
Replace defective micro-
processor, refer to Control-
ler Service
.
AL28
Low Suction
Pressure
Suction pressure too
low for normal
operation.
N/A
Power cycle the unit.
Resetting the unit may cor-
rect problem, monitor the
unit.
Suction Pressure
Transducer (SPT)
Confirm accurate SPT
pressure readings, refer
to MANIFOLD GAUGE
SET
.
Replace SPT if
defective.
Discharge Pres-
sure Transducer
(DPT)
Confirm accurate DPT
pressure readings, refer
to MANIFOLD GAUGE
SET
.
Replace DPT
if defective.
AL50
Air Vent Po-
sition Sensor
(VPS)
VPS Sensor
out of range.
Vent Position Sen-
sor (VPS)
Make sure VPS
is secure.
Manually tighten panel.
If the alarm persists, re-
place the sensor or the
assembly.
Replace VPS.
Table 4–6 Controller Alarm Indications
CODE #
CAUSE
COMPONENTS
TROUBLESHOOTING
CORRECTIVE ACTIONS
Summary of Contents for 69NT40-561-019
Page 2: ......
Page 4: ......
Page 74: ......
Page 127: ...8 3 T 359 Figure 8 2 SCHEMATIC DIAGRAM Evergreen Unit Configuration ...
Page 128: ...T 359 8 4 Figure 8 3 UNIT WIRING DIAGRAM Evergreen Unit Configuration Sheet 1 of 2 ...
Page 129: ...8 5 T 359 Figure 8 4 UNIT WIRING DIAGRAM Evergreen Unit Configuration Sheet 2 of 2 ...
Page 130: ......
Page 134: ......
Page 135: ......