Service Manual

SERVICE MANUAL (C,H,T)VA9 & (C,H,T)VH8
16 421 08 5600 02
Specifications subject to change wi thout notice.
57 Fault SUCTION PRESSURE
SENSOR FA ULT
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 FAUL T
(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
65 Local DC VOLTS
LOW - SPEED
LIMITING
NA Both Caused by other
fault code shut down
System will attempt to run again
Low supply line
voltage (< 197 VAC)
Check supply voltage to ODU; if low contact
utility provider
Loose wire in control
box area
Loose wire: check for loose wire in ODU
Inverter internal
damage
Replace Inverter
66 Event OUTDOOR FAN
DROPPED O UT
6 Minutes Both MOC is reporting
that fan motor isn’t
running
Troubleshoot fan motor and make sure it is
working
3T Inverter enters
test mode
Replace inverter with latest software
67 Event STATOR HEATER
FAUL T
6 Minutes Both There is a demand
for stator heat but
MOC doesn’t detect
it
Check compressor winding resistance or
mis- wire of compressor leads at terminals
U,V,W
Damaged inverter
generating other
inoperable fault
codes such as 88, 95
Replace Inverter
68 Event 10 MIN STAGE 2
WARMUP DELA Y
10 Minutes Both High voltage power
cycle
No action