Johnson Controls HMH72B48 User Manual

Table 13: Drive fault code - 24k/36k
Fault code Fault description Possible reasons for fault Resolution
13 DC voltage detected abnormal
14 PFC LOW voltage detected failure
1. The input voltage is too high
or too low.
2. Drive board fails.
1. Check the power
supply.
2. Change the drive
board.
15 AD offset abnormal detected failure
16 Inverter PWM logic set fault
17 Inverter PWM initialization failure
18 PFC_PWM logic set fault
19 PFC_PWM initialization fault
20 Temperature abnormal
21
Shunt resistance unbalance
adjustment fault
Drive board fails. Change the drive board.
22 Communication failure
1. Communication wire
connection is poor.
2. Drive board fails.
3. Control board fails.
1. Check the wiring.
2. Change the drive
board.
3. Change the control
board.
23 Incorrect motor parameters Initialization is abnormal. Reset the power supply.
26 DC voltage mutation error
1. The power input changes
suddenly.
2. Drive board fails.
1. Check the power
supply to provide
stable power supply.
2. Change the drive
board.
27 D axis current control error
1. System overload, phase
current is too high.
2. Drive board fails.
1. Check the system
to see if it works
normally.
2. Check the stop valve to
see if it is open.
3. Change the drive
board.
28 Q axis current control error
1. System overloads, phase
current is too high.
2. Drive board fails.
1. Check the system
to see if it works
normally.
2. Check the stop valve to
see if it is open.
3. Change the drive
board.
Installation Manual: HMH7 Series - 17 SEER Horizontal Discharge Modulating Heat Pump42
Johnson Controls Ducted Systems

Johnson Controls HMH72B48 Specifications

General

Brand	Johnson Controls
Model	HMH72B48
Category	Heat Pump
Language	English