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Finishing and Preparing for Start Up
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TROUBLESHOOTING
Error Codes
Table 27: Hydro Kit Error Code Troubleshooting (Continued)
Error Code Hydro Kit
Model
Error Type Cause
18
(K2, K3)
*Enabled for
Emergency
Operation
Water outlet temperature sensor error The Hydro Kit refrigerant to water heat
exchanger’s waterside outlet temperature sensor
malfunctioned. Sensor and/or cable may be
disconnected or shorted.
21 K3 Inverter compressor IPM defect R134a circuit compressor and/or inverter board
has malfunctioned.
22 K3 Inverter compressor overcurrent R134a compressor current transformer sensed
excessive current draw.
23 K3 Inverter compressor DC Link low voltage Insufficient power sensed in the DC charging
circuit to operate compressor. Obtain an inverter
board testing instrument and verify DC charging
circuit is operating correctly.
25 K3 High/low Inverter input voltage R134a circuit inverter sensed the input voltage
was out of tolerance (+/- 10%) for a minimum
period of 4 seconds.
26 K3 Inverter compressor activation failure R134a circuit inverter compressor failed to start.
27 K3 Inverter PSC/PFC Fault Error R134a circuit inverter board detected excessive
current draw.
28 K3 Inverter DC Link high voltage error Excessive power sensed in the DC charging
circuit. Triggered by an unexpected stop of the
compressor. Check inverter compressor for
malfunction. Use an inverter checker to verify the
inverter board is operating properly.
29 K3 Inverter compressor overcurrent R134a circuit compressor locked out due to
compressor current transformer sensing a high
current draw condition.
32 K3 Excessive rise of inverter compressor discharge
temperature
R134a circuit compressor shut down due to high
discharge gas temperature.
34 K3 Excessive rise of high pressure of inverter
compressor
R134a circuit compressor shut down due to high
discharge pressure.
35 K3 Excessive drop of low pressure of inverter
compressor
R134a compressor shut down due to low suction
pressure.
36 K3 Low pressure ratio error of inverter compressor R134a compressor high/low side differential
pressure ratio dropped below 1.8 for a minimum of
three minutes.
40 K3 Inverter compressor CT sensor defect R134a compressor current transformer failure.
41 K3 Inverter compressor discharge pipe temperature
sensor defect
R134a compressor discharge temperature sensor
has failed and/or cable is loose, disconnected or
shorted.
42 K3 Low pressure sensor defect of inverter compressor R134a compressor suction pressure sensor has
failed and/or cable is loose, disconnected or
shorted.
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