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AMM
Sealed
% Figure 2: Cabin Ventilation System Schematic, Lycoming Version
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Air Conditioning
AMM
Trouble-Shooting
1. General
This table tells you how to trouble-shoot the air conditioning system. If you find the trouble in column 1, do the repair in column 3.
Trouble Possible Cause Repair
Carbon Monoxide detector becomes dark. Exhaust muffler cracked. Replace or repair the exhaust muffler. (Refer to Chapter 78).
Burning smell in the cockpit. Exhaust muffler cracked. Replace or repair the exhaust muffler. (Refer to Chapter 78).
Heating system supplies warm air when set to OFF. Heat valve control cable out of adjustment. Heat valve control cable broken. Adjust the heat valve control cable. Replace the heat valve control cable.
No hot air flows to the canopy. Distributor valve control cable out of adjustment. Distributor valve control cable broken. Adjust the distributor valve control cable. Replace the distributor valve control cable.
No hot air flows to the footwells. Distributor valve control cable out of adjustment. Distributor valve control cable broken. Adjust the distributor valve control cable. Replace the distributor valve control cable.
No cool air from 1 outlet. Other outlets operate correctly. Outlet defective. Replace the cool air outlet.
Doc # 6.02.01 Page 101
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AMM
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Air Conditioning
AMM
Maintenance Practices
1. General
This Section gives you the maintenance practices for the cabin heating system and tells you how to replace outlets for the cooling system. Refer to Section 78-00 for maintenance data on the exhaust muffler part of the heat-exchanger.
2. Remove/Install the Heat Valve
Refer to Figure 3.
A. Remove the Heat Valve
Detail Steps/Work Items Key Items/References
(1) Remove the engine cowlings. Refer to Section 71-10.
WARNING: IF THE ENGINE HAS BEEN RUNNING, TAKE CARE WHEN YOU TOUCH THE HEAT VALVE. THE HEAT VALVE GETS HOT.
(2) Release the worm drive clamp which holds the flexible hose to the heat valve. Then disconnect the hose from the valve.
(3) Set the CABIN HEAT control lever to ON.
(4) Loosen the screw which holds the control cable to the swivel fitting in the heat valve. Access through the front of the valve.
(5) Remove 5 bolts and washers which attach the heat valve to the firewall.
(6) Remove the heat valve from the firewall.
Doc # 6.02.01 Page 201
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AIRCRAFT AMM
Instrument Panel Cover
Distributor Valve Control Cable
Defrost Hose
Defrost Hose Heat Valve Control Cable
Firewall
Heat Valve Control
Cable Lock-Nut
Hot Air Hose to Passenger Foot Wells Cable Binder Attaching Bolt Washer Floor Panel 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址:钻石40飞机维护手册 DA 40 SERIES AMM 2(8)