Testing The Rotary Control Switches - Friedrich QUIETMASTER 2008 Service Manual

TESTING ThE rOTArY CONTrOL SWITChES

(Heat Pump & Electric Heat Models)
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
Heat
Med
Heat
High
Heat
Yes
MAX
HEAT
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
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".
(See Figure 12)
Low
Cool
Med
Cool
High
Cool
No Money Saver
®
MAX
COOL
Allow 3 min. between restarts
(See Figure 13)
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 Switc h
(Heat Pump / Electric
Heat Model s
(See Figure 14)
KS, KM, SL Models
A six 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)
Fan
Only
High
Cool
Medium
Cool
Yes
MIN
S P E E D
Sleep
Setting
Low
Cool
No Money Saver
®
MAX
Allow 3 min. between restarts
19