SYSTEM OPERATION
7
1. On the CTK04 HOME screen, select MENU.
2. From the MENU screen, scroll down and select In-
staller Options.
3. Enter installer password if known.
a. The password is the thermostat date code and
can be obtained by selecting the red Cancel but-
ton and selecting the Dealer Information button.
b. Once recorded click the green OK button and
return to the previous step.
4. Select YES to continue.
5. Select View / Edit Current Setup.
6. Scroll down and select Dehumidification.
7. Once open select Dehumidification Equipment: None.
8. From the Dehumidification Menu select A/C with Low
Speed Fan and click the green Done button.
9. Additional Dehumidification operational options can
be selected in the resulting window.
10. Once satisfied with the selection navigate to the
HOME screen by selecting the Done button and se-
lecting Yes to verify the changes.
11. Select Previous Menu, then the HOME to return to
the main menu.
DEHUMIDIFICATION TIPS
For effective dehumidification operation:
• Ensure “Dehum” is ON through the Installer Options
menu and/or in the ComfortNet User Menu (COOL
SETUP)
- If ON, the Dehumidification menu should be visible
in the main menu.
• Verify the cooling airflow profile is set to “Profile D”.
- See the Cool Set-up section of the Installation Man-
ual for complete airflow profile details.
- By default “Dehum” is ON and the cooling airflow
profile is set to “Profile D”.
• For additional dehumidification control, airflow set
-
tings are field adjustable and can be fine-tuned to a
value that is comfortable for the application from a
range of +15% to -15%.
- See the Heat Pump Advanced Feature Menu sec-
tion of the installation manual for more detail.
FAULT CODE HISTORY
The heat pump’s diagnostics menu provides access to the
most recent faults. The six most recent faults can be ac-
cessed through the control board seven segment displays.
Any consecutively repeated fault is stored a maximum of
three times.
Example: A leak in the system, low refrigerant charge or an
incompletely open stop valve can cause the unit to flash
error code E15. This error code suggests that the unit is
experiencing operation at low pressure. The control will only
store this fault the first three consecutive times the fault
occurs.
NOTE: The fault list can be cleared after performing mainte-
nance or servicing the system to assist in the troubleshoot-
ing process.