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5-5
T -309
CONDITION POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.14 COMPRESSOR OPERATING IN REVERSE
CAUTION
Allowing the scroll compressor to operate in reverse for more than two minutes will result in internal
compr e ssor damage. Turn the start--stop switch OFF immediately.
Incorrect wiring of compressor
Electrical
Incorrect wiring of compressor contactor(s)
Check
E
l
e
c
t
r
i
c
a
l
Incorrect wiring of current sensor
C
h
e
c
k
5.15 ABNORMAL TEMPERATURES
Discharge temperature sensor drifting high Replace
Failed economizer, TXV or solenoid valve Replace
High discharge temperature
Plugged economizer, TXV or solenoid valve Replace
H
i
g
h
d
i
s
c
h
a
r
g
e
t
e
m
p
e
r
a
t
u
r
e
Loose or insufficiently clamped sensor Replace
Failed liquid injection solenoid valve Replace
L
o
w
s
u
c
t
i
o
n
t
e
m
p
e
r
a
t
u
r
e
Discharge temperature sensor drifting low Replace
L
o
w
suction temperature
Loose or insufficiently clamped sensor Replace
5.16 ABNORMAL CURRENTS
Unit reads abnormal currents Current sensor wiring Check