DB7110U UNIVERSAL HEAT PUMP DEFROST CONTROLLER
34-00032—01 8
Green LED: Indicates system power and operation.
Red LED: Indicates a fault is currently present and the user should inquire with the 7-segment display for more 
information.
6 Reverse Delay
Compressor off time when switching between heating and defrost 
modes. Setting this to 0 will shorten the overall defrost time, but 
may result in objectionably loud noises when entering/exiting 
defrost (depending on compressor type). 
0-30 seconds 30 seconds
7 Maximum Defrost Time 
The maximum amount of time a defrost cycle can last. A defrost 
cycle may be terminated earlier if the coil reaches the Termination 
Temperature, but a defrost cycle should never last longer than this 
time.
8-14 minutes 14 minutes
8 Aux Heat Lockout Temperature
W requests will be ignored if the outdoor temperature is higher 
than this temperature. The Aux heat output will still function 
normally during a defrost cycle regardless of this setting.
Do not set this temperature below the Compressor Lockout 
Temperature or there will be a range of temperatures with no 
heating operation.
0degF-40degF No Lockout
(OF)
9 Compressor Lockout Temperature
Y requests will be ignored if the outdoor temperature is lower than 
this temperature.
Do not set this temperature above the Aux Heat Lockout 
Temperature or there will be a range of temperatures with no 
heating operation.
-10degF-40degF No Lockout
(OF)
Table 4. Configuration Screens.  (Continued)
Display Description Range Default