Johnson Controls HMH72B36 User Manual

Table 13: Drive fault code - 24k/36k
Fault code Fault description Possible reasons for fault Resolution
29
Saturation error of D axis current
control integral
1. Momentary system
overload.
2. The compressor parameter
is not suitable.
3. 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.
30
Saturation error of Q axis current
control integral
1. Momentary system
overload.
2. The compressor parameter
is not suitable.
3. 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.
35 EE data abnormal
Driver board EEPROM is
abnormal.
1. Change the EEPROM.
2. Change the drive
board.
Table 14: Drive fault code - 48k/60k
Fault code Fault description Possible reasons for fault Resolution
1
Q axis current detection, failure in
drive control
1. The compressor wire
connection is poor.
2. Bad drive board
components.
3. The compressor start load is
too large.
4. Compressor
demagnetization.
5. Compressor oil shortage,
serious wear of crankshaft
6. The compressor insulation
has failed.
1. Check the wire of the
compressor.
2. Change the drive
board.
3. Allow pressures to
equalize and then
resume unit operation.
4. Change the
compressor.
5. Change the
compressor.
6. Change the
compressor.
2
Phase current detection, failure in
drive control
1. Compressor voltage default
phase.
2. Bad drive board
components.
3. The compressor insulation
has failed.
1. Check the compressor
wire connection.
2. Change the drive
board.
3. Change the
compressor.
3
Initialization, phase current
imbalance
Bad drive board components. Change the drive board.
4
Speed estimation, failure in drive
control
1. Bad drive board
components.
2. Compressor shaft clamping.
3. The compressor insulation
has failed.
1. Change the drive
board.
2. Change the
compressor.
3. Change the
compressor.
Installation Manual: HMH7 Series - 17 SEER Horizontal Discharge Modulating Heat Pump 43
Johnson Controls Ducted Systems

Johnson Controls HMH72B36 Specifications

General

Brand	Johnson Controls
Model	HMH72B36
Category	Heat Pump
Language	English