Condenser High-Temperature Protection - Hitachi RPIL-3.0UFE1NH Service Manual

5. CONTORL LOGIC DESCRIPTION

5.6 Condenser high-temperature protection

DC-Inverter outdoor unit
AC will enter T3 protection if any of the following conditions is satisfied.
T3
Off
TE10
TE11
On
Condition1:
Cooling mode: When the outdoor coil temp. T3 keeps higher than T2 for 10 seconds, the
compressor and outdoor fan will shut off. When T3 is lower than T1, the compressor
and outdoor fan will restart up.
Condition2:
Heating mode: When the indoor coil temp. T3 keeps higher than T2 for 10 seconds, the
compressor and outdoor fan will shut off. When T3 is lower than T1, the
compressor and outdoor fan will restart up.
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