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9.0 DIAGNOSTICS & TROUBLESHOOTING
9.4 Active Protection Fault Details (cont.)
Diagnostics
the designed operating envelope then the compressor
will be kept from operating.
IMPORTANT:
It is common during
startup and shutdown for the compressor to venture
outside the designed operating envelope. It is possible
this fault can be seen on an installation when there
is nothing wrong with the installation. For this reason
the VSODC will auto reset and return the system to
operational condition after the compressor delay is
complete.
Prior to restarting the compressor the VSODC
7-segment display will flash a “31”.
35 – Suction Temperature Thermistor Failure –
A102_O
If the VSODC identifies an issue with Outdoor Suction
Thermistor (OST) sensor the VSODC will flash a 35
on the dual 7-segment LEDs.
IMPORTANT:
This mode of active
protection is automatically reset once the OAT sensor
failure is corrected.
36 – Suction Pressure Sensor Failure – A956_O
If the VSODC identifies an issue with the Suction
Pressure Transducer (SPT) sensor the VSODC will
flash a 36 on the dual 7-segment LEDs.
IMPORTANT:
This mode of active
protection is automatically reset once the OAT sensor
failure is corrected.
42 – Compressor Temperature Thermistor Failure
– T955_O
If the VSODC identifies an issue with the Compressor
Sump Thermistor (CPT) the VSODC will flash a 42 on
the dual 7-segment LEDs.
IMPORTANT:
This mode of active
protection is automatically reset once the CPT sensor
failure is
corrected.
83 – Evaporator Temperature Thermistor Failure –
T953_O
If the VSODC identifies an issue with the Evaporator
Temperature Thermistor (EVAPIN) sensor the VSODC
will flash an 83 on the dual 7-segment LEDs.
IMPORTANT:
This mode of active
protection is automatically reset once the OAT sensor
failure is corrected.
84 – Outside Ambient Thermistor Failure - T952
If the VSODC identifies an issue with the Outdoor
Ambient Thermistor (OAT) sensor the VSODC will
flash an 84 on the dual 7-segment LEDs.
IMPORTANT:
This mode of active
protection is automatically reset once the OAT sensor
failure is corrected.
93 – Configuration Data Restore Failure – A950_O
If the VSODC identifies issue(s) reading the model
data from the memory card, the VSODC will
automatically shut the compressor off and keep it from
operation. When this fault occurs the VSODC will lock
out the compressor to keep it from operating and flash
an ”L” on the dual 7-segment LEDs followed by a 93.
IMPORTANT:
This mode of active
protection must be manually reset.
