Friedrich racservmn Service Manual page 21

SYSTEM CONTROL SWITCH - TEST
Disconnect leads from control switch (See Figure 25)
There must be continuity as follows:
Figure 25
SYSTEM CONTROL SWITCH (See Figure 26)
(Heat Pump & Electric Heat Models)
An eight position control switch is used to 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.
1. "Off" Position - everything is off.
2. "Lo Cool" Position - fan operates on low speed,
compressor is on.
3. "Med Cool" Position - fan operates on medium speed,
compressor is on.
4. "Hi Cool" Position - fan operates on high speed,
compressor is on.
5. "Hi Heat" Position - fan operates on high speed,
compressor or electric heater is on.
6. "Med Heat" Position - fan operates on medium speed,
compressor or electric heater is on.
Figure 26
System Control Switch
SYSTEM CONTROL SWITCH
(Heat Pump & Electric Heat Models) (See Figure 27)
An eight position control switch is used to 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.
1. "Off" Position - everything is off.
2. "Lo Cool" Position - fan operates on low speed,
compressor is on.
3. "Med Cool" Position - fan operates on medium speed,
compressor is on.
4. "Hi Cool" Position - fan operates on high speed,
compressor is on.
5. "Hi Heat" Position - fan operates on high speed,
compressor or electric heater is on.
6. "Med Heat" Position - fan operates on medium speed,
compressor or electric heater is on.
7. "Lo Heat" Position - fan operates on low speed,
compressor or electric heater is on.
8. "Fan Only" Position - operates on medium speed.
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 27
System Control Panel
Heat Pump & Electric Heat Models
(YS, ES, YM, EM, YL & EL)
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