Self-Diagnosis At The Thermostat; Troubleshooting Error Codes At The Indoor And Outdoor Units; Figure 10-1 Error Codes Displayed At The Thermostat - Emerson Liebert SRC18 User Manual

Troubleshooting

10.3 Self-diagnosis at the Thermostat

If the unit has a problem, it will self-diagnose with Troubleshooting mode and display "CH" and an error
code in the Temperature section of the display, Figure 10-1.
NOTE
Verify the thermostat function settings after recovery from an error. The
settings could have changed because of communication with the controller in
group mode.

Figure 10-1 Error codes displayed at the thermostat

10.4 Troubleshooting Error Codes at the Indoor and Outdoor Units

Table 10-1 list the most-common error codes that you will see on these units. Some models may display
codes not listed here. Please contact service if a power-down/reboot does not correct the issue. Do not
attempt to fix the unit yourself.
The error codes indicate different types of failures, assist in self-diagnosis, and helps track frequency of
occurrence. Figures 10-2 and 10-3 show where error codes display based on model number.
If two or more errors occur simultaneously, the lower number displays first. When an error is resolved, the
number no longer displays.
Decoding Error Display for SRC18
Refer to Figure 10-2.
LED 1 blinks (green) to indicate the second, "ones" digit of the error code.
LED 2 blinks (red) to indicate the first, "tens" digit of the error code.
For example, if the error code is 21, LED 1 blinks 1 time, and LED 2 blinks 2 times.
® ™
Liebert SRC User Manual 106