R
G
W
Y
C
TR300-10w
R
G
W
Y
C
TR300-10w
For Problem A/C
For Problem Heat
SYMPTOM:
When using 4 wires (R, G, W, Y),
the air conditioning equipment tries
repeatedly to turn on, but cannot. At
times the display dims or disappears.
CAUSE:
There is not enough power available
to "power share".
REMEDY:
Connect a 270 ohm, 10 watt power
resistor
at the furnace
as shown below.
TROUBLESHOOTING
SYMPTOM:
The air conditioning does not
attempt to turn on.
CAUSE:
The compressor timer lockout may
prevent the air conditioner from
turning on, for a period of time.
REMEDY:
See page 12 of the Owner's Manual
and configure step #9 to defeat the 5-
minute compressor lockout.
SYMPTOM:
The display is blank.
CAUSE:
Lack of proper power.
REMEDY:
Make sure power is turned on to
the furnace and 24vac between
R
&
W
.
If
C
is used, 24vac between
R
&
C
.
AUTO
C
OOL
76
H
EAT
68
AUTO
C
OOL
76
H
EAT
68
AUTO
C
OOL
76
H
EAT
68
Page 13
