Johnson Controls HMH72B36 User Manual

Fault codes
Table 10: Outdoor unit fault codes
Fault code Fault description Possible reasons for fault Resolution Comments
1
Outdoor ambient
temperature sensor
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. Reconnect the
outdoor ambient
temperature sensor.
2. Replace the outdoor
ambient temperature
sensor components.
3. Replace the outdoor
control board
components.
2
Outdoor coil
temperature sensor
fault
1. The outdoor coil
temperature
sensor has a poor
connection.
2. The outdoor coil
temperature sensor
has failed.
3. Sensor circuit failure.
1. Reconnect the
outdoor coil
temperature sensor.
2. Replace the outdoor
coil temperature
sensor components.
3. Replace the outdoor
control board
components.
3
Unit overcurrent
turn-off fault
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. Replace the electrical
control board
components.
2. Normal protection.
3. Replace the
compressor.
4. See Table 11.
5. See Table 12.
4 EEprom data error
1. EE components fails.
2. EE components
control circuit fails.
3. EE components are
inserted incorrectly.
1. Replace the board.
2. Replace the outdoor
control board
components.
3. Reset the EE
components.
Installation Manual: HMH7 Series - 17 SEER Horizontal Discharge Modulating Heat Pump 35
Johnson Controls Ducted Systems

Johnson Controls HMH72B36 Specifications

General

Brand	Johnson Controls
Model	HMH72B36
Category	Heat Pump
Language	English