28
Compressor Check Flow Chart
Compressor Fault
Check maintenance
display
Put unit in stand by
Wait eight (8) minutes
for compressor time
out
Turn power off at
breaker / fuse panel
Verify connections
and insure they are
seated fully
Check
Compressor
shell temperature
Allow compressor to
cool; thermal switch
to reset
Restore power at
breaker / fuse panel-
press power button
and verify that unit is
in effi ciency mode
Raise set
point 10°
Wait ten (10) seconds
for compressor to
turn on
Perform voltage and
current checks
Fan
on
Hot
Cool
No
Fan
on
No
Yes
Yes
Table 4
Check Voltage *
(VAC)
± 5%
Resistance
(Ω)
± 5%
C-R 240 3.5
C-S 298 6.1
R-S 380 9.5
C-GROUND 128 >1M
R-GROUND 112 >1M
S-GROUND 321 >1M
*Values with 240 VAC input
Check CN207 on
control board pin
1 to 3 for 240 VAC
Voltage
present
No
Yes
Replace
control board *
Replace fan
assembly
*If replacing the control board does not resolve the issue, contact technical support.