22
approximately 40 psig when the low pressure control automatically resets. If the
low pressure switch trips 3 times within 120 minutes of operation during a partic-
ular call for heating operation, the defrost control will lock out compressor and out-
door fan operation. If the lock-out due to low pressure occurs at an outdoor ambi-
ent temperature below 5°F, the defrost control will automatically exit the lock-out
mode when the outdoor ambient temperature rises to 5°F. This feature is neces-
sary since the low pressure control could possibly have opened due to the outdoor
ambient being very low rather than an actual system fault.
Exiting Lock-Out Mode:
To exit the lock-out mode, remove 24 volts to the defrost con-
trol by removing power to the unit or by shorting the two defrost control pins together.
ENHANCED FEATURE DEFROST CONTROL DIAGNOSTIC CODES
SENSOR TEMPERATURE VS. RESISTANCE TABLE
REPLACEMENT PARTS
Contact your local distributor for a complete parts list.
CHARGE INFORMATION
Refer to the appropriate charge chart on the unit, or in this booklet.
TROUBLESHOOTING
Refer to the troubleshooting chart included in this manual.
WIRING DIAGRAMS
Refer to the appropriate wiring diagram included in this manual.
LED 1
LED 2
Control Board Status
OFF
OFF
No Power
ON
ON
Coil Sensor Failure
OFF
ON
Ambient Sensor Failure
FLASH
FLASH
Normal
OFF
FLASH
Low Pressure Lockout (short test pins to reset)
FLASH
OFF
High Pressure Lockout (short test pins to reset)
ON
FLASH
Low Pressure Control Open
FLASH
ON
High Pressure Control Open
Alternate Flashing
5 Minute Time Delay
Degrees C
Degrees F
Ohms
-20
-4
96,974
-10
14
55,298
0
32
32,650
10
50
19,903
20
68
12,493
25
77
10,000
30
86
8,056
40
104
5,324
Summary of Contents for RJNL-B SERIES
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