Fault Codes - Johnson Controls HMH7 Series Installation Manual

Fault codes

Table 10: Outdoor unit fault codes
Fault code Fault description
Outdoor ambient
1 temperature sensor
fault
Outdoor coil
2 temperature sensor
fault
Unit overcurrent
3
turn-off fault
4 EEprom data error
Possible reasons for fault
1. The outdoor ambient
temperature
sensor has a poor
connection.
2. The outdoor ambient
temperature sensor
has failed.
3. The sampling circuit
has failed.
1. The outdoor coil
temperature
sensor has a poor
connection.
2. The outdoor coil
temperature sensor
has failed.
3. Sensor circuit failure.
1. The control board
current sampling
circuit has failed.
2. Excessive current due
to low supply voltage.
3. The compressor has
failed.
4. Overload in cooling
mode.
5. Overload in heating
mode.
1. EE components fails.
2. EE components
control circuit fails.
3. EE components are
inserted incorrectly.
Installation Manual: HMH7 Series - 17 SEER Horizontal Discharge Modulating Heat Pump
Johnson Controls Ducted Systems
Resolution
1. Reconnect the
outdoor ambient
temperature sensor.
2. Replace the outdoor
ambient temperature
sensor components.
3. Replace the outdoor
control board
components.
1. Reconnect the
outdoor coil
temperature sensor.
2. Replace the outdoor
coil temperature
sensor components.
3. Replace the outdoor
control board
components.
1. Replace the electrical
control board
components.
2. Normal protection.
3. Replace the
compressor.
4. See Table 11.
5. See Table 12.
1. Replace the board.
2. Replace the outdoor
control board
components.
3. Reset the EE
components.
Comments
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