Johnson Controls DHPM09NWM42Q1 Installation Manual page 28

898150-UIM-B-0113
TABLE 12: Error Codes
Indoor Character
H6 Indoor fan not communicating
H7 Compressor lost-step protection
Lc Unit start-up failure
Ld Compressor loss of phase protection
LE Compressor locked rotary protection
LP Indoor and outdoor unit mismatch
L3 Outdoor DC fan motor malfunction
L9 Power factor protection
Current detect circuit malfunction
Pc
or current sensor malfunction
PH High voltage protection
PL Low voltage protection
PU Capacitor charge failure
P5 Compressor overcurrent protection
Communication failure between
P6
main board and driver board
P7 Outdoor control failure
28
Display
All system functions are terminated.
If this condition is detected six times within
one hour, system will shut down.
All system functions are terminated.
Outdoor unit must be de-energized and re-
energized to resume normal operation.
Compressor unable to start.
All system functions are terminated.
All system functions are terminated.
All system functions are terminated.
Outdoor unit must be de-energized and re-
energized to resume normal operation.
All system functions are terminated.
All system functions are terminated.
All system functions are terminated.
All system functions are terminated except
indoor fan.
All system functions are terminated.
System Status
Troubleshooting for
Possible Causes
Possible Indoor control failure or indoor
motor failure.
• Check wiring between fan motor and in-
door control.
• Check wiring between fan motor and ter-
minal marked OFFAN.
• Replace one or both, if necessary.
The following conditions will generate this
error:
• Unable to detect rotor position during
operation
• Actual rotor rotations exceed set speed.
Outdoor unit must be de-energized and re-
energized to resume normal operation.
See unit start-up troubleshooting charts.
Compressor start up phase current is
lower than 0.5 amps.
De-energize system and restart.
The two system components are mis-
matched. Refer to engineering handbook
for correct match-up.
• Check wiring between fan motor and out-
door control terminal marked OFFAN.
• If wiring is correct, replace outdoor DC
fan motor.
Indoor unit is experiencing either a high or
low input voltage condition. Verify proper
input voltage at terminal strip N(1) and 3.
The offset voltage is higher than the limit
value. If this condition is detected six times
with in one hour, system will shut down.
• Check input voltage on outdoor unit ter-
minal strip (N and L terminals).
• If voltage is higher than 265VAC, discon-
nect power to unit. Correct input voltage
problem before reapplying power to sys-
tem.
• If voltage is below 265VAC, then check
capacitor while unit is turned off.
• If voltage is between 200-208V, capacitor
is working properly
• If voltage is some other value, replace
capacitor.
• If voltage is some other value, replace
capacitor.
• If input voltage and capacitor are normal,
replace outdoor control.
• Check input voltage on outdoor unit ter-
minal strip (N and L terminals).
• If voltage is lower than 150VAC, restart
system and check power again.
• 9 - 12 kBtu, 208-230VAC systems only --
Check reactor (choke) line connection on
outdoor control terminal marked AC-L2.
Refer to the ProficienTECH Ductless Splits
Technical Training Manual.
Refer to the ProficienTECH Ductless Splits
Technical Training Manual.
Communication bus will automatically
reset and resume normal operation.
Replace outdoor control.
Johnson Controls Unitary Products