Friedrich 2009, 2008 service manual Testing The Rotary Control Switches, Electric Shock Hazard

TESTING THE ROTARY CONTROL SWITCHES

(Heat Pump & Electric Heat Models) (See Figure 12) An e ight position control switch i s used t o regulate the operation of the fan motor and compressor. The compressor can be operated with the fan operating at low, medium or high speed in the cooling or heating mode. The fan motor can also be operated independently on medium speed. See switch section as indicated on decorative control panel.

NOTE: Heat pump models with electric heat - in the heat position, heating element only will be energized when outdoor temperature is below the operating range of the heat pump.

Figure 12

System Control Panel

Heat Pump & Electric Heat Models

(YS, ES, YM, EM, YL & EL)

Fan

Only

Low	Low
Heat	Cool
Med	Med
Heat	Cool
High	High
Heat	Cool

Yes No Money Saver®

MAX MAX

HEAT COOL

Allow 3 min. between restarts

WARNING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

SYSTEM CONTROL SWITCH - TEST (See Figure 13) Disconnect leads from control switch. Turn control to position being tested. There must be continuity as follows:

1.“ Off” Position - no continuity between terminals.

2.“ Lo Cool” Position - between terminals “C” and “3”, “C2” and “2”, “LO” and “M/S”, “AR” and “5”.

3.“ Med Cool” Position - between terminals “C” and “3”, “C2” and “2”, “M” and “M/S”, “AR” and “5”.

4.“ Hi Cool” Position - between terminals “C” and “3”, “C2” and “2”, “H” and “M/S”, “AR” and “5”.

5.“ Hi Heat” Position - between terminals “C” and “1”, “C2” and “4”, “H” and “M/S”, “AR” and “5”.

6.“ Med Heat” Position - between terminals “C” and “1”, “C2” and “4”, “M” and “M/S”, “AR” and “5”.

7.“ Lo Cool” Position - between terminals “C” and “1”, “C2” and “4”, “LO” and “M/S”, “AR” and “5”.

8.“ Fan Only” Position - between terminals “L1” and “M”.

Figure 13

System Control Switch (Heat Pump / Electric Heat Models

KS, KM, SL Models (See Figure 14)

Asix position control switch is used to regulate the operation of the fan motor and compressor. The compressor can be operated w ith the fan operating at l ow, medium o r high speed. The fan motor can also be operated independently on m edium speed. See switch s ection a s indicated on decorative control panel.

Figure 14

System Control Panel (KS, KM, SL)

S P E E D

Fan		Sleep
Only		Setting
High		Low
Cool		Cool
Medium
	Cool
Yes	No	Money Saver®

MINMAX

Allow 3 min. between restarts

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