Trane CXAO, Installation Operation & Maintenance

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RF-SVX003A-GB
Troubleshooting
SYMPTOM cooling heating
Who can take
corrective
action
U = User
S = specialised
personnel
Probable cause Possible remedy
I Frost in
liquid pipe
downstream
from a fi lter
X X S The liquid fi lter is clogged Replace the fi lter
L The unit
works
continuously
without ever
stopping
X X S Lack of refrigerant gas See item G.
X X U
Incorrect tuning of the
operating thermostat
Check the setting
X X S Excessive thermal load Reduce the thermal load
X X S
Compressor does not give
the thermal output
Check, change or revise
X X S The liquid fi lter is clogged Replace
M The
unit works
regularly
but with an
insuf fi cient
capacity
X X S Low refrigerant charge See point G
X X S
4-way reversing valve
defective
Check the power supply
and the coils of the valve
and replace the valve
N Frost in the
compressor
intake pipe
X X S
Expansion device that is
not working properly
Verify replace
X S
Water circulation pump
blocked
Unlock the pump
X X S
Water circulation pump
defective
Check the pump and
replace if necessary
X X S Low refrigerant charge See point G
X X S The liquid fi lter is clogged Replace
O The
defrosting
cycle is never
activated
X S
4-way reversing valve
defective
Check the power supply
and the coil of the valve
and replace the valve
X S
The defrost thermostat
is worn out or has an
incorrect calibration value
Check and replace if
defective or change the
calibration value
P Abnormal
noises
detected in
the system
X X S Compressor noisy
Check and replace if
necessary
X X S The panels vibrate Fasten properly
Q Unit does
not start
X X s
phases of the supply
network reversed
Invert phases