Installation Guide

WHL-648 Rev. 000 Rel. 002 Date 1.3.18
46
Part 9 - Controls
A. Control and Display Overviews
Figure 40 - Control Panel Detail
Figure 41 - LCD Display
B. Start-Up Sequence
After the appliance is powered ON, the LCD display shows a sequence
of information. The icons will ash, followed by various indicators that
describe the appliance controller and software versions. It will take the
appliance roughly 15 seconds to cycle through the Start-Up Sequence.
Display Items Time for Display Remarks
LCD Test
1 sec All segments “ON”
0.5 sec All segments “OFF”
Category: UFTC
1 sec Pdn
1 sec 0051
Software Version for
Front Panel
1 sec SPn
1 sec 00.xx
Software Version for
Appliance
1 sec SFn
1 sec xx.xx
Hardware Version for
Appliance
1 sec Hdn
1 sec 00xx
Table 26 - Start-Up Sequence
NOTE: When the appliance is powered ON, the fan will operate at
maximum speed for 1 minute to purge the air and any fumes from the
intake and exhaust pipes.
Figure 42 - Initial Display Screen
NOTE: The initial display screen will dier depending on a number
of factors, including whether the appliance detects a call for heat or
hot water.
The Control System can operate through user and service modes
that have specic LCD outputs and dedicated controls, including:
• Changing the Set-Point Temperature
• Lock Function
• Status Display
• Installer Mode
• Error Mode
• Outdoor Temperature Mode
The LCD display also features a backlit lamp that will illuminate:
• When a user action is detected (a button is pressed)
• The display has timed out for approximately 2 minutes
After start-up, the display appears as follows.