Introduction
Introduction
The air conditioning unit in the Volvo P23 is different to the ones in the S70/V70. The major change is integration with the brand new network based electrical system where the CCM (Climate Control Module) controls the air conditioning unit.
Just like before, the climate control unit will be available in 3 versions:
- ECC, (Electronic Climate Control) which is a fully automated climate control unit with a cooler and manual setting options.
- MCC, (Manual Climate Control) which is a manual climate control unit with cooler.
- STD, (Standard Heater) which is a manual climate control unit without cooler.
When describing new features the S70/V70 climate control unit will be used as a comparison.
New features of climate control unit
Network module, CCM, which controls all climate functions. The CCM is integrated with the climate panel.
A particle filter is installed after the fan as standard to purify also recirculated air.
The ECC has five electronically controlled shutter valve motors (stepping motors). The MCC/STD has four.
The speed compensation closes a shutter valve which controls the fresh air inlet when the speed exceeds 160 km/h (100 miles/h).
Variable electronic blower control.
Air outlets in B pillars available for adjustment by rear seat passengers.
Changes in electrical connection and new connectors.
The interior temperature sensor is installed in the climate panel.
The exterior temperature sensor is installed in the right exterior rear view mirror (LH or RH drive does not matter).
Extended diagnostic functions available through the data link connector with VIDA.
New features of EEC controls
Separate, spring back buttons with indication diodes for:
- Selection of air distribution head/body/feet can be set to the desired combination.
- Automatic climate control of temperature, air flow, air distribution recirculation, fresh air intake and air conditioning.
- The defroster will automatically adjust the climate control to achieve the best possible window defrosting.
- Electrically heated rear window.
- Electrically heated front seats.
- Recirculation.
Continuous knob with 7 indicated manual positions with indication diodes for blower control.
Selected functions are stored in memory and will remain there no matter how long the power to the CCM has been cut off.
Note! The automatic climate control or defroster requires the ignition key to be in position II, and this will reset any selected settings. (Recirculation can be manually controlled during automatic climate control, and the blower can be manually controlled during defrosting.) When the automatic climate control or defroster is turned off, the system will return to any selected settings.
New features of MCC/STD controls
Separate, spring back buttons with indication diodes for:
- Electrically heated rear window.
- Electrically heated front seats.
- Recirculation.
A 30 step knob for blower control.
The temperature controls regulate the temperature shutter valves through stepping motors.
The air distribution controls regulate the distribution shutter valves through a stepping motor.
Selected functions are stored in memory and will remain there no matter how long the power to the CCM has been cut off.
New features of cooler
There is a new drainage pipe which guides the water away from the blower motor casing and the filter housing.
The evaporator surface has a new treatment and a polyurethane sheath to reduce corrosion and bad smells.
The compressor has a higher capacity and is installed directly on the auxiliary unit bracket.
The compressor is started in a new fashion to avoid opening the safety valve.
TEV supplies a more even temperature regulation by adapting the amount of coolant to any requirements.
The freeze protection temperature sensor measures the temperature of the air that goes by the evaporator.
Linear pressure sensor installed directly on wiper.
Blower delay as customer setting. The delay is activated when complaints of bad smells occur, to remove any condensation water from the evaporator.
Service valves on both low and high pressure side.
Note! Coolant may only be filled from the high pressure side to avoid liquid coolant getting into the compressor.