Haier GE NS23AM Service Manual page 62

High Pressure Switch Protection Errors
NOTE: System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidification). Only the latest
active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat
Inverter
Alert Priority
Flash
Code Condition
Code
Information
412
Only-Dealer
Service
413
Urgent
Compressor Operation, Checkout and Status / Error Codes
Operation:
use with HFC 410A refrigerant. The NS23AM60 unit uses a 380VAC three phase variable capacity scroll compressor that
is approved for use with HFC 410A refrigerant. The compressor, when connected to an inverter, is capable of operating in
a running frequency range from 20 hertz up to a maximum of 70 hertz. (maximum hertz is dependent on compressor size).
The compressor speed is determined by suction pressure when installed with a conventional 24VAC thermostat.
Checkout:
NOTE: The compressor motor winding resistance is the nominal resistance at 77F. When measuring compressor motor
each other. The actual winding resistance is impacted by temperature, refrigerant and oil. Do not automatically condemn a
open windings and for shorts to ground during testing.
Figure 32. Compressor Operation, Checkout and Status/Error Codes
NOTE: If compressor replacement is required, remove the compressor through the top of the unit. Removal through the
access panel is not possible.
Actual Displayed
Component or System Operational State and Troubleshooting Tip
Alert Text
The unit high pressure is above the upper limit.
System will shut down.
OD Open High
Pressure Switch
Check condenser fan motor, expansion valve (if installed), indoor unit blower motor, stuck
Thermostat will shut down the outdoor unit.
OD High Pressure
Switch Strikes Check system charge using superheat and sub-cooling temperatures.
Lockout
Check outdoor fan operation.
Reset by putting outdoor unit control in test mode or resetting low voltage power.
Table 19. Alert Codes and Troubleshooting
ROTARY
COMPRESSOR
SCROLL
COMPRESSOR
(-60 unit only)
-24
-36
-48
-60
Page 62
How to Clear Alert
Code
Automatically
clears after the high
pressure switch
closes or a power
reset.
Automatically clears
when the system
detects that the issue
no longer exists.
0.883 0.883 0.883
0.883 0.883
0.883
0.705 0.705 0.705
0.587 0.587
0.587
31-5000746 Rev. 0