R95PA Status & Fault Codes

Rheem Gas Furnace: R95PA

Re: Status & Fault Codes

The furnace control comes standard with a 7-segment diagnostic display.

During Standby mode (with no faults), the display will read "0".

During normal Heating, Cooling or Continuous Fan operation, a letter will be displayed to describe the mode of operation:

"C" = Cooling or Heat Pump Operation
"F" = Continuous Fan Operation
"H" = Gas Heating Operation

Code	Description
0	Standby - No Faults
C	Compressor On - Cooling or Heat Pup
H	Gas Heat On
F	Continuous Fan On
10	1 Hour Lockout
11	Failed Ignition
12	Low Flame Signal
13	Flame Lost
14	Unexpected Flame
20	Twinning Error
22	Main Limit or HALC tripped
26	Reversed Polarity
33	Roll-Out Open
55	Pressure Switch Closed When it Should be Open
57	Pressure Switch Open When it Should be Closed
58	Water Sensed
61	Blower Fault
93	Internal Control Fault

FAULT RECALL

Upon power reset, the three most recent faults which are less than one week old will be flashed in succession from the most recent to the oldest. After one week, a fault will be removed from the fault buffer.

MANUAL FAULT CLEAR

Faults will automatically be cleared from the fault buffer after one week. The fault buffer can also be manually cleared if this is desired. For the first 30 seconds after a change in state of dipswitch SW4, the furnace control will wait to determine if the switch becomes on/off/on/off/on/off or off/on/off/on/off/on within 30 seconds. When this action is detected within 30 seconds, the fault code memory buffer shall be cleared. Be sure to return the dipswitch to the original state (on or off) or is in the desired position after clearing the fault buffer using this method.

5-Minute Lockout

A five minute “soft” lockout will be initiated if the pressure switch fails to close after 60 seconds of continuous inducer operation at the beginning of a normal heat cycle (pressure switch proving period). The seven-segment display will display the appropriate fault. Lockout will automatically be reset after five minutes.

1-Hour Lockout

A one hour “soft” lock out will be initiated when:

Flame has not been detected after four ignition trials.
Flame has been lost for five times in one heat call.
Undesired flame has been detected. The one-hour period will commence after flame is no longer detected.
Dead Blower has been detected (main limit circuit open for more than 150 seconds)
When voltage has unexpectedly been detected on the gas valve circuit and voltage goes away when inducer is shut off.

The seven-segment display will alternately display “10” and the code number for the fault causing the lockout. Lockout will automatically be reset after one hour.

Hard Lockout

Three conditions shall cause a hard lockout:

The control senses an unspecified internal fault. Fault code “93” is set and displayed. This lockout condition cannot be reset by cycling the heat call.
Voltage is detected unexpectedly on the gas valve contacts (welded relay) and will not clear by cycling the inducer. Fault code “93” is set and displayed. This lockout condition cannot be reset by cycling the heat call.
The furnace control will declare that the blower motor is inoperable (dead) if the main limit control has been open for more than 150 seconds. Gas heating is terminated. However, the control continues to try to operate heating for up to four attempts in case the blower motor starts working again. If a dead blower has been declared four times in one heat call, the furnace control enters a hard-lockout. Fault code “61” is set and displayed. This lockout condition CAN be reset by cycling the heat call.