www.DaikinApplied.com 43 OM 1263 • MICROTECH UNIT CONTROLLER
4 Way Valve Problem - (4WayValve: Problem)
This alarm occures only on heat pump units when any of
the following conditions are true. When compressor heating
state is normal yet the DFT-Teg > 10°F for 15 minutes. When
compressor cooling state is normal yet the DFT-Teg < or equal
to 15°F for 15 mintues. When cooling or heating state is
normal, defrost cycle is inactive, and 4 way valve ag is false
for 15 minutes. Or when compressor state transisitons from
alternate initialization to normal and 4 way valve ag is false.
When this alarm is active compressor cooling and heating
operaiton is disabled.
The alarm must be manually cleared once corrective action is
taken.
Protection Interlock Problem - (Protection
Interlock Problem)
This alarm occures when the following are true for 90 seconds:
system mode is remote, inverter compressor start/stop
command is on, and compressor interlock is o.
When this alarm is active compressor cooling and heating
operation is disabled.
The alarm must be manually cleared once corrective action is
taken.
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