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Fujitsu FO20R Series Installation Instructions Manual page 58

Variable speed r-410a heat pump outdoor units
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9.0 DIAGNOSTICS & TROUBLESHOOTING
9.5 Active Protection Fault Details (cont.)
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:
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:
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:
protection must be manually reset.
58
This mode of active
This mode of active
This mode of active
D1 – Memory Card Configuration Data Write
Failure – A951_O
If the VSODC identifies issue(s) writing 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 "D1" on the dual 7-segment
LEDs.
IMPORTANT:
protection must be manually reset.
This mode of active

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