Status And Diagnostic Description - Rheem ARL-JEZ 16 Seer Series Installation Instructions Manual

7 -Segment Diagnostic Description
Display
Code
0 Standby
c Y1
C Y2
Anti-Short Cycle Timer (3 minutes) or
c or
Minimum Run Timer (30 seconds)
C Flashing
F ICC Board Fuse Open
1 (*) Compressor Running Extremely Long Run
Cycle (Cooling mode only)
2 (*) Pressure Control Trip (L terminal output only)
21 (***) Low Pressure Control Trip
Note: Low-pressure control is ignored for 90
seconds after call for unit operation.
Active Protection – The ICC will try to
restart the unit after the pressure control
automatically re-closes.
Unit will try to restart 3 times in the same
L
thermostat call for operation (Y1) before
lockout (fault L21).
L21 (**) Lockout - Low Pressure Control Trip (**)
23 (***) High Pressure Control Trip
Active Protection – The ICC will try to
restart the unit after the pressure control
automatically re-closes.
Unit will try to restart 3 times in the same
thermostat call for operation (Y1) before
lockout (fault L23)
L23 (**) Lockout - High Pressure Control Trip (**)
25 Outdoor Ambient Temperature Sensor
27 Abnormal Low Line or No Line Voltage
(See unit nameplate for operating voltage)
28 Abnormal High Line Voltage
3 (*) Short Cycling
24

Status and Diagnostic Description

Status / Possible Cause -Troubleshooting
Information
Standby - No call for operation
First Stage or Single Stage Unit Operation
Second stage unit operation
(2-stage unit only)
Waiting for anti-short cycle timer to expire
Waiting for minimum run timer to expire
1. Low voltage wiring damage or miswired
1. Low refrigerant charge
2. Air ducts have substantial leakage
3. Check thermostat operation
4. Dirty filter
5. Dirty outdoor coil
1. (See faults 21, L21, 23, L23)
1. Unit is low on refrigerant charge
2. Indoor coil is frozen (cooling mode)
3. Dirty indoor coil or filter (cooling mode)
4. Indoor blower is not running (cooling mode)
5. TEV is not operating correctly
LPC tripped three consecutive times in same
thermostat call
1. Outdoor coil is dirty (cooling mode)
4
2. Outdoor fan is not running (cooling mode)
3. Dirty indoor coil or filter (heat pump mode)
4. Liquid line restriction (filter drier blocked, etc.)
5. Excessive refrigerant charge
HPC tripped three consecutive times in same
thermostat call
1. ICC board sensor damaged (ICC
will continue to operate)
1. Check incoming line voltage to the disconnect
and unit
2. Check wiring connections
1. Check line voltage
1. Check thermostat for intermittent demand
signal
2. Check thermostat location in zone (too close to
discharge grill)