23
Microprocessor Control cont.
Hydronic Operation
SW4 (Status Board Switch)
In the OFF position, the hydronic mode is
disabled and the damper connected to CR3/
CR4 is opened. The switch must be in the ON
position to enable the hydronic mode.
NOTE:
If
the status board is not connected to the main
control board, the hydronic mode is disabled.
SW3 (4 and 5 Override Selection DIP
Switches)
These DIP switches configure the time that the unit will
run in the current mode of operation if it is not the priority
mode (SW2 #3 FAH/Hydronics) of operation selected.
Example: If the unit is operating in hydronic mode, forced
air heat (SW2 #3 is OFF) is the priority. A Y1 call from
the FAH zone is present at the control board. When SW3
numbers 4 and 5 are both in the ON position, the unit
will operate in the hydronic mode for five minutes. If the
hydronic call is not satisfied within the five minutes, the unit
will switch to FAH mode. When FAH is satisfied, the unit
will switch back to hydronic. (See Override Selection DIP
Switches table.)
St
at
us
LE
D P
C
B
17
P5
03A
01
R
ev
A
SW4
R
R
R
R
R
G
Y
R
ComforTalk and FaultFlash Thermostats
When the heat pump microprocessor control is configured
for ComforTalk or FaultFlash (SW2-8 ‘off’) thermostats the
thermostats will flash or display alert codes when a lockout
condition is present. SW2-8 in the ‘on’ position configures
the control to operate with typical thermostats (continuous
lockout signal).
The tables below show the codes that will be displayed on
the different ComforTalk and FaultFlash thermostats.
ComforTalk Thermostats
Thermostat Display Lockout Code
Lockout Description
"High Pressure" or "E2"
High Pressure Fault
"Low Pressure" or "E3"
Low Pressure Fault
"E4"
Not Applicable
"Water Flow" or "E5"
Water Flow Fault
"E6"
Not Applicable
"Condensate" or "E7"
Condensate Fault
"Voltage Range" or "E8"
Voltage Out of Range
"RPM" or "E9"
RPM Fault
These thermostats can be confi gured to display the lockout condition
“text” or error number.
* A slow fl ash of 1 second on and off means the heat pump
microprocessor SW2-1 is confi gured for “Test Mode”.
FaultFlash Thermostats
Thermostat Display Lockout Code
Lockout Description
2 Flashes
High Pressure Fault
3 Flashes
Low Pressure Fault
4 Flashes
Not Applicable
5 Flashes
Water Flow Fault
6 Flashes
Not Applicable
7 Flashes
Condensate Fault
8 Flashes
Voltage Out of Range
9 Flashes
RPM Fault
AFFINITY COMBINATION INSTALLATION MANUAL
Summary of Contents for YACT038-072
Page 2: ......
