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16
Error Codes and Alarm Status
Unit Control Panel
The display shown below has four digits. The left two digits indicate the error code # ( 1 to 24 ), The On/Off icons above these
two digits indicate the currents state of the error code. The right two digits show the history count (up to 99) of the associated
error code. The display contains a maintenance icon (wrench) that will illuminate to indicate when the unit needs service.
This wrench indicates an error code # is on (active). To find out which one, check all error codes.
Check Error Codes
Clear History Counters
1. Press the Enter key to activate the
display.
2. Each press of the scroll key display
the next error code.
1. Press & hold the Enter key and the
Scroll Key for 6 seconds.
Error
Code Problem
Action
1 Front Panel Button Stuck For More Than 20 Seconds Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input.
2 Input Voltage Out of Specification (187 - 253) Unit stops, open all relays until voltage is back within specs then resume operation.
3 Indoor Temperature Sensor is Open or Shorted Unit defaults to 75°F in COOLING or 68°F in HEATING and will continue to operate
4 Indoor Coil Temperature Sensor is Open or Sho
rted
The unit's control board defaults to 40°F. It will override the sensor and the unit will
continue to operate.
5 Outdoor Coil Temperature Sensor is Open or Shorted
The unit defaults to 20°F, overriding the sensor. The unit will continue to operate.
Using Elec Heat if available for HEATING. If not available, it will use HEAT PUMP if
the outdoor temperature allows.
6 Outdoor Coil > (grater than) 175 F
The unit will shut down for 5 minutes. resume operation for 3 minutes. If test fails 3
times, the unit opera
turn power off and on.
tion is locked out. See troubleshooting page 42. To reset,
7 Indoor Coil < (less than) 30 F for 2 consecutive minutes
The compressor will turn off and the High Fan speed will run. When coil temp reachs
45°F the unit will resume operation after lockout time.
8 Unit Cycles > (greater than) 9 Times per hour
The unit will continue to operate and be monitored.
9 Unit Cycles < (less than) 3 Times per Hour The unit will continue to operate and be monitored.
11 WallStat Problem or Connection Issue The unit will not operate.
12 Not Applicable
10 Not Applicable
Not Applicable
Not Applicable
13 High Pressure Limit Switch is Open
VPAK 24K Unit Only
If unit is cooling or heat pump is on, shut down compressor. Run high fan until
switch closes, then resume operation. The third occurance in 1 hour locks unit out.
Applicable to
24K unit only. To reset, turn power off and on.
14 Not Applicable Not Applicable
15 Heat Pump Error
Occurs if the indoor ambient temperature range falls below 0°F or greater than 130°F. The
error code will remain on until the temperature reaches the operating range and then
the unit will return to normal operation.
17 Equipment Doesn't Meet Minimum Configuration The compressor must be enabled and have at least 2 fan speeds.
18 Not Applicable
Not Applicable Not Applicable
Not Applicable
19 Not Applicable Not Applicable
20 Not Applicable Not Applicable
21 Not Applicable Not Applicable
22
Outdoor Coil Temperature < 30 F for 2 consecutive
(Not an error code)
minutes
Unit will use electric heat to satisfy heating demands until the temperature equals or
exceeds 45°F. Applicable for Heat Pump models only.
23
24 Not Applicable Not Applicable
if setting is below 75°F in cool mode or if above 68°F in heat mode.
16 Temperature beyond operating limits
If indoor coil temperature is less than ambient temperature for 3 minutes, the unit will
use electric heat to satisfy the heating demand. Causes could be bad reversing
valve, heat load too high.