Honda ACCORD HYBRID 2005 Service Manual page 1590

Climate Control
S y s t e m D e s c r i p t i o n ( c o n t ' d )
A / C Compressor
The dual scroll hybrid compressor is a t w i n chamber, dual compressor, that can use both mechanical (belt-driven) and
electric power (motor-driven) to compress refrigerant.
The mechanical side uses a normal electric clutch controlled by the climate control m o d u l e , and is diagnosed using
traditional diagnostic procedures.
The electric motor side uses a high voltage, brushless, three-phase m o t o r driven by a controller in the intelligent
power unit (IPU). The climate control m o d u l e controls the hybrid compressor m o t o r operation, and actual m o t o r speed
is determined by the audio-HVAC display panel (via) the PCM.
Intake Exhaust
I
Belt-driven scroll I Motor-driven scroll
(75 cc) " (15 cc)
Compressor Operation Logic
The Accord Hybrid A/C Compressor has 3 stages. The heater control m o d u l e determines w h i c h stage the compressor
should be in and sends the request to the PCM.
Stage 1 (start up)- c o m b i n e d operation (mechanical and electric power).
Stage 2-Mechanical only
Stage 3-Variable speed electric m o t o r only
NOTE: The system w i l l not transition f r o m stage 1 to stage 3 directly or f r o m stage 3 to stage 1 directly. The
compressor transitions t h r o u g h each stage in sequence.
21-20