Haier GE NS23AM Service Manual page 49

Field Test Mode Operation
mode and allows the installer to perform multiple tests on
the control / unit.
Diagnostic Mode
Diagnostic mode is only available when the system is idle
or during an active / suspended call for heating or cooling.
Diagnostic mode is terminated when the exit command is
given, the button is pressed and released without entering
the diagnostic menu or 10 minutes has passed, whichever
When this mode is selected all installed temperature
sensor valves (non-open and non-short) are shown on the
7-segment display. The following system status codes are
displayed:
• Cooling
• Cooling stage or cooling percentage demand operation
• Active error codes
Outdoor Fan Mode
Diagnostic mode is only available while the system is in idle
mode. This mode can be exited with the proper command
or after 10 minutes has passed.
In diagnostic mode, the control energizes the outdoor fan
at the highest speed.
Charge Mode Operation
To initiate the NS23AM Charge Mode function, install
the jumper across the two Charge Mode Pins (CHRG
MODE) on the outdoor control. The Charge Mode can be
used when charging the system with refrigerant, checking
the refrigerant charge, pumping down the system and
performing other service procedures that requires outdoor
unit operation at 100% capacity.
Display
No Change - idle (*) No Change - idle (*)
Solid .
Solid Puts unit in diagnostic mode. (Displays ambient temperatures and any active error codes.)
Solid
Clears error history (**)
Solid
Enter diagnostic recall mode. Displays up to 10 error codes in memory.
Solid Starts outdoor fan.
String Enter unit code programming.
*No change indicates the display will continue to show whatever is currently being displayed for normal operations.
**Note once the error history is deleted it cannot be recovered. After the history is deleted, the unit will reset itself.
Table 16. Field Test, Diagnostic Recall and Program Menu Options
31-5000746 Rev. 0
NS23AM Charge Mode Operation with a Conventional
24VAC Thermostat
On applications with a conventional 24VAC thermostat, the
charge mode jumper must be installed on the Charge Mode
Pins after providing a Y1 cooling demand to the NS23AM
to initiate the Charge Mode. A cooling blower demand must
also be provided to initiate blower operation on the cooling
speed on the indoor unit. The compressor and outdoor fan
motor will operate at 100% capacity. To exit the charging
mode, remove the Charge Mode Jumper and remove
the Y1 Cooling demand and indoor blower demand. The
Charge Mode has a maximum time of 60 minutes and will
automatically exit the charge mode after 60 minutes is the
charge mode jumper is left in place.
Charge Mode
Disabled
CHRG
MODE
Display and Action (normal operation)
Page 49
Charge Mode
Enabled
CHRG
MODE
Figure 21.