International comfort products R9MSB Service And Technical Support Manual page 14

flashing, or a code composed of 2 digits. The first digit is the
number of short flashes, the second digit is the number of
long flashes.
For an explanation of status codes, refer to service label
located on control door or Figure 5, and the troubleshooting
guide which can be obtained from your distributor.
Retrieving Stored Fault Codes
NOTE: Fault codes cannot be retrieved if a thermostat
signal (24-v on W, Y, G, etc.) is present, or if any delays
such as blower off-delays are active.
The stored status codes will NOT be erased from the control
memory when 115- or 24-v power is interrupted. See the
Service Label (Figure 5) for more information. The most
recent fault code may be retrieved as follows:
THE BLOWER IS LOCATED
TO THE RIGHT OF THE
BURNER SECTION, AND
AIR CONDITIONED AIR IS
DISCHARGED TO THE LEFT.
THE BLOWER IS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED DOWNWARD
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1. Leave 115-v power connected to furnace.
2. Observe the status LED through the blower door (the
3. Remove the Main/Control door (the upper door on
4. BRIEFLY (2−3 seconds) disconnect and reconnect
5. The LED will flash the last stored fault code. Refer to
6. A component test sequence will follow.
7. Reinstall the Main/Control door.
Figure 6 − Multipoise Orientations
Specifications subject to change without notice.
lower door on upflow applications) indicator. Refer to
the Service Label (Figure 5) to interpret the LED.
upflow installations).
ONE of the main limit wires.
the Service Label (Figure 5) to interpret the LED.
THE BLOWER IS
LOCATED BELOW THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED UPWARD.
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
DISCHARGED TO THE RIGHT.
THE BLOWER IS
A02097
440 04 6601 01