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 Dehumidication.
7. Once open select Dehumidication Equipment: None.
8. From the Dehumidication Menu select A/C with Low
Speed Fan and click the green Done button.
9. Additional Dehumidication operational options can
be selected in the resulting window.
10. Once satised 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.
For eective dehumidication operation:
• Ensure “Dehum” is ON through the Installer Options
menu and/or in the ComfortNet User Menu (COOL
SETUP)
- If ON, the Dehumidication menu should be visible
in the main menu.
• Verify the cooling airow prole is set to “Prole D”.
- See the Cool Set-up section of the Installation Man-
ual for complete airow prole details.
- By default “Dehum” is ON and the cooling airow
prole is set to “Prole D”.
• For additional dehumidication control, airow set-
tings are eld adjustable and can be ne-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.
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 ash
error code E15. This error code suggests that the unit is
experiencing operation at low pressure. The control will only
store this fault the rst 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.