www.poolpak.com | 800-959-772576 | MPK Series - Installation, Operation and Maintenance
Check for a blown fuse or open phase on the incoming power supply.
SysStart = System Startup Active
Indicates that control power has recently been cycled.
Normal indication.
SFDeadHd = Supply Fan Dead Head Warning
Controller has identified that recirc and outside air dampers are both almost closed.
Check recirc and outside air dampers and actuators.
AxHtFail = Auxiliary Heat System failure
Controller has identified that the temperature rise through the air heating system is lower than expected.
Check aux air heating system.
• Hot Water Coil – Check valve actuator and for presence of hot water.
• Furnace – Check power vent fan/motor, gas supply pressure, and furnace fuses.
AxClFail = Auxiliary Cool System failure
Controller has identified that the temperature drop through the aux air cooling system is lower than expected.
Check aux air cooling system.
• Chilled Water Coil – Check valve actuator and for presence of chilled water.
Cpr1Flt = Compressor 1 Fault active (same as for Cpr2Flt, Cpr3Flt)
A fault condition has occurred in compressor module 1. If the fault is still active, it will show under Current
Status. If it has automatically cleared, refer to the condition shown under Last Fault. Refer to the list of
compressor module fault conditions for more information on troubleshooting.
CPRFAULTNAME:
Below is a list of all compressor faults as displayed on the controller and possible causes:
SwitchOff = Compressor Run/Pumpdown Switch is in the PD position
Indicates that the compressor module has been disabled. Placing the switch back in the RUN position will clear
this condition. Be sure that the compressor module is OK to run before setting this switch to RUN.
Warmup = Compressor module warmup mode is active.
Indicates that control power to the module has been turned on within the last 5 minutes. During this period, the
compressor will not run.
LiqTFail = Liquid refrigerant Temperature failure
Indicates that the value read from the liquid temperature sensor is outside of the expected range. This sensor is
located on the liquid line in the TXV compartment of the unit.
• If the value is a large negative number (-192F), this indicates an open circuit to the sensor. Check the sensor
and wiring connections.
• If the value is a large positive number (256F), this indicates a short circuit to the sensor. Check the sensor and
wiring connections.
SucTFail = Suction refrigerant Temperature failure
Same as LiqTFail. This sensor is located under the insulation on the suction line in the compressor module.
CurFail = Compressor Current transducer failure
Indicates that the value read from the compressor current transducer is outside of the expected range.
• If the value is negative, this indicates an open circuit to the transducer or a lack of +VDC power. Check
the sensor and wiring connections and the output voltage of the +VDC terminal on the compressor control
module. The voltage at this terminal should be between 20 and 30 VDC. The DC current in the sensor loop
should be between 4 and 20 mA.
• If the value is greater than the max value in the analog input configuration screen, this indicates a failed
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