Rheem ARL-JEZ 16 Seer Series, Installation Instructions Manual, Page: 25 / 40

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(*) – Indicates flash code will be an output on the ICC “L” terminal to the indoor
thermostat “L” terminal. Unless a diagnostic/fault is manually cleared by cycling
power or pressing the TEST button the flash code will continue at the L terminal for
up to 20 seconds after the start of a successful call for unit operation.
L Terminal Output
• Flash 1 – Compressor running extremely long run cycle
• Flash 2 – Low or High pressure control trip
• Flash 3 – Unit short cycling
• Flash 5 – Compressor will not run
• Flash 8 – Control mis-operation
• Flash 9 – Low control voltage
(**) – Lockout modes are reset by either cycling line voltage, low voltage, or by
pressing control TEST button for 1 second. The control will attempt to start the unit
when the TEST button is pressed and released (See TEST button label)
(***) – Caution: Indicates Active Protection. Unit will attempt to restart auto-
matically.
NOTE: For Additional Questions or Comments concerning the ICC, call 1-888-
923-2323.
SERVICE
SINGLE-POLE COMPRESSOR RELAY
Integrated Compressor Control Relay is a single-pole relay used on all single phase
units up through 5 tons. Caution must be exercised when servicing as only one leg
of the power supply is broken with the relay.
5 (*) (***) Compressor will not run
Active Protection – After detecting compressor
will not run the ICC control will shut the unit
down. The control will try to restart the unit
every 5 minutes for 4 tries. After that, the ICC
will attempt a restart every 20 minutes up to 6
hours.
1. Check for damaged, miswired, or wrong run
capacitor
2. Check for damaged or miswired start capacitor
and relay
compressor
4. Check for broken wires, loose connectors, or
miswired
5. Check compressor motor windings for
continuity
6. Check for open compressor internal protector
7. Check for excessive liquid refrigerant in
compressor
L5 (**) Lockout – Check Compressor (**) After 6 hours of attempted unit restart ICC
control
-
8 (*)
output only)
9 (*)
(Less than 18V)
1. Check transformer for miswiring or
overloading.
3. Check voltage levels at ICC board and
ICC Board Mis-operation
ICC Board Mis-operation (L terminal 1. Check ICC board compressor relay
1. Check ICC board compressor relay
ICC Secondary Voltage Low
!
CAUTION
UNIT MAY START SUDDENLY AND WITHOUT WARNING
Solid red light indicates a thermostat call for unit operation is present at the ICC.
ICC will attempt to start unit after short cycle timer expires or when in Active
Protection mode will attempt to restart unit prior to Lockout mode.