Friedrich racservmn Service Manual page 19

Figure 16
System Control Switch
(SC Model Only)
1. Disconnect leads from control switch.
2. Check continuity between all switch positions shown in
Figure 17.
SYSTEM CONTROL PANEL
"WS" Models (See Figure 18)
A five 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.
The fan motor can also be operated independently on medium
speed. See switch section as indicated on decorative control
panel
Figure 18
System Control Panel (WS Models)
SYSTEM CONTROL SWITCH - TEST
Disconnect leads from control switch (See Figure 19)
There must be continuity as follows:
1. "Off" Position - no continuity between terminals.
2. "Lo Cool" Position - between terminals "L1" and "C", "LO"
and "MS."
3. "Med Cool" Position - between terminals "L1" and "C", "M"
and "MS".
4. "Hi Cool" Position - between terminals "L1" and C", "H"
and "MS."
5. "Fan Only" Position - between terminals "L1" and "2."
Figure 19
System Control Switch
(WS Models)
SYSTEM CONTROL SWITCH "WE" & "WY" Models
(See Figure 20)
An eight position switch is used to regulate the operation of
the fan motor, compressor and electric heater. The unit can
be operated in cooling or heating mode with the compressor
or electric heater on and the fan motor operating on low,
medium or high speed.
The fan motor can also be operated independently on medium
speed. See switch section as indicated on decorative control panel.
Figure 20
System Control Panel
(WE & WY Models)
SYSTEM CONTROL SWITCH - TEST (See Figure 21)
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".
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