Rheem A17 Series Installation Instructions Manual page 37

10.0 DIAGNOSTICS AND TROUBLESHOOTING
10.2 Status and Diagnostic Codes (cont.)
Descriptions of the EcoNet
Dual 7-Segment
LEDs Display
Code
5L - Active Protection Protector Trip
The Outdoor Control has had a protector trip
for longer than 4 hours or has tripped 3 times
during a call for cooling.
6 - Compressor Open Start Circuit
The Outdoor Control detects current in the Run
circuit but not in the Start circuit of the compres-
sor
6L - Active Protection Compressor Open Start
Circuit Lockout
The Outdoor Control detects loss of current in
the Run circuit three (3) times in one cooling call
9 - Active Protection - Line Voltage Brown Out
FLASHING
21 - Low Pressure Control Open
The Outdoor Control detects the LPC is open.
Note: The low pressure control is ignored for
the first 90 seconds of compressor operation
21L - Active Protection Low Pressure Lockout
FLASHING
2-Stage Control diagnostic codes are provided below:
TM
Diagnostic Description
Status/Possible Cause - Trouble-
shooting Information
• Check for damaged, miswired, or wrong run
capacitor
• Check for broken wires, loose connectors, or
miswired compressor
• Check compressor windings for continuity
• Check for open compressor internal protector
• Check for damaged, miswired, or wrong run
capacitor
• Check for broken wires, loose connectors, or
miswired compressor
• Check compressor windings for continuity
• Check for damaged, miswired, or wrong run
capacitor
• Check for broken wires, loose connectors, or
miswired compressor
• Check compressor windings for continuity
• Check for compressor locked rotor
The Outdoor Control has sensed line voltage has
dropped below 175V and has shut the compres-
sor off for 5 minutes. If line voltage is above 187V
after 5 minutes, the compressor is allowed to
start.
• Units has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Expansion valve is not operating correctly
LPC has opened 3 times in the same call for
cooling operation, the Outdoor Control has locked
out the compressor to protect it. Outdoor Control
alternately flashes L and 21
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