NOTE: When
B. ONE MINUTE SPEED CHANGE TIME DELAY
When compressor changes speeds from high to low or low to high, there is a
C. HEATING OPERATION
This product utilizes a
NOTE: If unit has not operated within the past 12 hr or following a unit
THERMISTOR CURVE
| 90 | |
(KOHMS) | 80 | |
70 | ||
| ||
| 60 | |
RESISTANCE | 50 | |
20 | ||
| 40 | |
| 30 |
10
0
0 | 20 | 40 | 60 | 80 | 100 | 120 |
TEMPERATURE (DEG. F)
A91431
Fig. 16—Resistance Values Versus Temperature
Control Box
Side of Unit
THERMISTOR PLACED UNDERNEATH BASE PAN (ATTACHED TO BASE PAN WITH ADHESIVE)
A02218
Fig. 17—View from Top of Base Pan
D. STATUS FUNCTION LIGHTS
A system control STATUS function light is located on the outdoor unit control board. (See Fig. 15). The STATUS light provides signals for several system operations. See Table 4 for codes and definitions. Table 4 also provides the order of signal importance. NOTE: Only one code will be displayed on the outdoor unit control board (the most recent, with the highest priority).
E. FACTORY DEFAULTS
Factory defaults have been provided in the event of failure of outdoor air thermistor and/or outdoor coil thermistor. Refer to Table 6 for default and function.
F. COMPRESSOR OPERATION
When the compressor operates in
G. CRANKCASE HEATER OPERATION
The
H. OUTDOOR FAN MOTOR OPERATION
The
TABLE 4—LED CONTROL FUNCTION LIGHT CODE
CODE | DEFINITION | * | |
Constant flash | No demand | 10 | |
No pause | Stand by | ||
| |||
1 flash | 9 | ||
w/pause | |||
|
| ||
2 flashes | 8 | ||
w/pause | |||
|
| ||
3 flashes | Outdoor ambient thermistor failure | 7 | |
w/pause | |||
|
| ||
4 flashes | Outdoor coil thermistor failure | 6 | |
w/pause | |||
|
| ||
3 flashes |
|
| |
pause | Thermistor out of range† | 5 | |
4 flashes |
|
| |
5 flashes |
|
| |
pause | Low pressure switch trip | 4 | |
1 flash |
|
| |
5 flashes |
|
| |
w/pause | High pressure switch trip | 3 | |
2 flashes |
|
| |
6 flashes | Compressor VC/VH trip | 2 | |
w/pause | |||
|
| ||
Constant light |
|
| |
No pause | Board failure | 1 | |
No flash |
|
|
*Function light signal order of importance in case of multiple signal request; 1 is most important.
† Check both thermistors to determine which is faulty.
TABLE 5—DEFROST DIP SWITCH SETTINGS
TIME | DIP SWITCH #1 | DIP SWITCH #2 |
30 | up | down |
60 | down | up |
90 | down | down |
120 | up | up |
|
|
|