COMFORT-AIRE B-SVH24SA-1 Service Manual page 40

9.3.6 Refrigerant Leakage Detection diagnosis and solution (EC)
Error Code
Malfunction conditions
Possible causes
Troubleshooting:
Shut off the power supply and
2 minutes
turn it on
still displaying the error code?
Yes
Is there cool air blowing
out from indoor air outlet?
No
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Is there any blockage? (Such as the
capillary or the welded points of the pipes.)
Yes
Clear the blockage
EC
Define the evaporator coil temp. T2 of the compressor just starts
running as Tcool.
In the beginning 8 minutes after the compressor starts up, if T2
(
Tcool－33.8
＜Tcool－1℃
seconds and compressor running frequency higher than 50Hz
does not remain continuous 3 minutes, and this situation
happens 3 times.
3 times, the display area will
T2 sensor faulty
●
Indoor PCB faulty
●
System problems, such as leakage or blockage.
●
later. Is it
Yes
Yes
Service Manual - SVH 09/12/18/24 Series
°F)
does not remain continuous for 4
Check if T2 sensor is well
connected. Correct the instal-
lation or replace T2 sensor.
Does the problem remain?
Yes
Replace indoor PCB.
Repair the leakage and
recharge the refrigerant.
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