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CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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56
Event
OAT-OCT
THERMISTOR OUT OF
RANGE
NA
Cool
Heating when
cooling is demanded
Check fuse on AOC control
Check wiring between AOC and reversing valve
troubleshoot reversing valve
Inspect outdoor coil for obstructions
Both
Coil Thermistor not
properly attached or in
wrong location
Ensure Sensor is properly clipped to the
distributor entry-tube
Outdoor Ambient
Temperature sensor
improperly installed
(sensor body may be
in contact with sheet
metal)
Properly install OAT sensor
57
Fault
SUCTION PRESSURE
SENSOR FAULT
NA
Both
Sensor Harness not
connected to AOC
control
Ensure plug is connected to AOC control
Broken or loose
harness wire
Check harness
Electrical short
destroyed
Transducer
electronics
Compare transducer reading to gage reading at
service valve (see transducer measurement chart);
Check system for electrical shorts and correct;
replace transducer
Heat damage during
brazing
Compare transducer reading to gage reading at
service valve (see transducer measurement chart);
replace transducer
59
Local
DISCHARGE TEMP
OUT OF RANGE
EVENT
(Stage down for each
occurrence, elevates to
fault code 74 after
5 occurrences.
Reduced capacity is
cleared if demand
cycle is satisfied
without ODT reaching
limit, or system has been
continuously
running at any stage for
2 hours with
reduced capacity)
15 Minutes Both
Refer to fault code 74
61
Local
FAN INVERTER FAULT
(elevates to fault code 76
after 5 occurrences)
6 Minutes
Both
Fan motor failed to
start
Troubleshoot outdoor fan motor & blade and make
sure they are working
Fan motor rotor
misalignment
System will attempt to run again
Refer to fault code 76
63
Local
FAN INVERTER
CURRENT FAULT
(elevates to fault code 86
after 5 occurrences)
6 Minutes
Both
Refer to fault code 86
Table 10 – Fault Code Actions (Continued)
Flash
Code
Type
AMBER LED
DESCRIPTION
Reset Time Mode
Possible Causes
Actions