Cleaning the Condenser/Evaporator

Special tools: 1159611-1, 11614-2

UUUA1 General and equipment
The air conditioning (A/C) system evaporator has a surface coating which can cause a concrete-like odor. The odor can be treated with an agent that is sprayed on to the evaporator.


Equipment for treating evaporator
- Compressed air spray for liquids, for example,. Volvo rust inhibitor spray P/N 1159611-1.
- Protective goggles.
- Rags.
- Vacuum cleaner.

Materials
- Odor eliminator A/C (liquid agent), P/N 1161454-2.


WARNING! READ WARNING TEXT ON PACK BEFORE COMMENCING WORK. USE PROTECTIVE GOGGLES AND GLOVES WHEN SPRAYING. SEAL HOLE AROUND THE SPRAY NOZZLE WITH RAGS DURING SPRAYING TO AVOID SPRAY MIST LEAKING OUT INTO THE CAR INTERIOR. ENSURE THAT VENTILATION IS GOOD.


UUUA2 Preparations for spraying

Opening the evaporator drainage
- Check and correct if necessary that the drainage from the evaporator is not blocked.
- Place a container below the evaporator drainage pipe in order to avoid spillage on the floor.

UUUA3 Warming up the evaporator








- Select recirculation, set temperature control to max. heat and blower selector to max. speed. All ventilation outlets should be fully open.
- Turn oft the air conditioning (A/C) compressor by disconnecting the cable connection from pressure switch (pressostat) in the engine compartment. (The compressor can be overridden if the air distribution selector is in the Defrost position and may therefore start up.)

Allow engine to run at working temperature for 20 minutes to expel all moisture from evaporator.


NOTE! Assemble spray while engine is warming up


UUUA4 Assembling the spray








- Fit flat nozzle to Volvo anti-rust spray and clean nozzle.
- Shake bottle containing Odor treatment air conditioning (A/C) well, and put the bottle in the spray holder.
- Insert spray riser pipe in container and screw spray onto holder.
- Set spray to green mark.
- Connect spray to compressed air.


Hint: Do not tilt the spray excessively! Tilting spray excessively may cause liquid to escape from container! If liquid escapes from the container empty it back in and complete the operation.



UUUA5 Disconnection of battery
- Turn off ignition.
- Disconnect battery ground lead.


UUUA6 Removing power unit or blower fan resistor
- Remove power unit or blower fan resistor.


For C70/V70/S70:
- power unit according to TTT B. Service and Repair
- blower fan resistor according to TTT G. Service and Repair

CAUTION! Do not disconnect power stage/blower fan resistor connectors!


UUUA7 Vacuum cleaning the evaporator






- Clean out the evaporator as far as possible with vacuum cleaner through the hole in the evaporator housing for the power unit/blower fan resistor.


UUUA8 Spraying evaporator








Odor elimination in evaporator
- Insert spray nozzle through power unit/blower fan resistor opening in housing.
- Cover hole with cloth.
- Protect interior trim with cloths.


WARNING! USE PROTECTIVE GOGGLES AND GLOVES. ENSURE THAT VENTILATION IS GOOD.


- Point the nozzle so the agent is sprayed towards the evaporator.
- Move nozzle backward and forward across evaporator while spraying to ensure that the entire surface of the evaporator is treated with agent. Use all the agent in the bottle.


UUUA9 Operations to complete treatment of evaporator

Connecting battery
- Reconnect battery ground lead.

For C70N70/S70:
- Reinstall power unit according to TTTB. (See UUU A6)
- Replacing blower fan resistor (MCC/STANDARD) TTTG. (See UUU A6)


UUUA10 Drying evaporator







- Set temperature control to max. heat and blower selector to max. speed.
- Start engine.
- Allow engine to run for 2 minutes.
- Switch oft the engine.
- Allow agent to act for 30 minutes.
- Start engine.
- Open car windows.
- Turn on recirculation, blower fan switch on max. speed and temperature selector to max. heat.
- Allow engine to run for 10 minutes to permit agent to dry and form protective skin, and to prevent agent from being washed oft by condensation.







UUUA11 Reconnect A/C compressor
- Engage air conditioning (A/C) compressor by reconnecting the connection at the pressure switch (Pressostat).


UUUA12 Reinstalling other components
- Reinstall other components removed.