Haier HU062WAMNA Service Manual page 96

Port Description
CN5-
Zone1 pump
XIAO
CN6-
Zone2 pump
XIAO
CN* indicates the terminal on main control board
CN*-XIAO indicates the terminal on sub control board
1. Startup condition (and)
a. Main controller on or sub controller on
b. Or
① Only controled by main and sub controllers, and thermo on
② When controled by third party controller, Zone1 has indoor
controller signal
③ When room thermostat control, Zone1 Tai on
④ When there's hot water requirement and hot water thermo on
2. OFF condition (or)
a. Main controller off or sub controller off.
b. And
① Only controlled by main and sub controllers, and thermo on
② When controled by third party controller, Zone1 has indoor
controller signal on
③ When controlled by room thermostat, Zone1 Tai off
④ No hot water requirement or there's hot water requirement and
hot water thermo off
Water pump is foreced to open when in defrosting, oil return, anti
freezing operation;
Pump delay 1min OFF
Pump stop during flow error
Note：
When zone2 without zoning, pump no output; When zone 2 has
zoning, pump will be controlled by master controller water temp.
setting or zone controller 2.
1. Startup condition(and):
a. Main controller ON or sub controller ON
b. Or
① Only control by main/sub controller, set heating/cooling mode
② When controlled by 3rd party controller, zone2 has indoor
controller signal.
③ When controlled by room thermostat, zone2 indoor ambient
temp. sensor ON.
2. OFF condition (OR):
a. Main controller OFF OR sub controller OFF
b. And
① Only controlled by main/sub controller, without heating/cooling
mode
② When controlled by 3rd party controller, zone2 has indoor
controller signal
③ When controlled by room thermostat, zone2 indoor ambient
temp sensor OFF.
Pump forced ON during defrosting, oil return, anti-freezing
Pump delay 1min OFF
Pump stop during flow error
Zone2 pump OFF when in hot water priority operation
96
Logic Remark
220V
220V