Description Of Drive Malfunction - Johnson Controls R SERIES Installation And Maintenance Manual

Malfunction
No. Error code
Overload
16 H4
protection
Malfunction of
17 H6
outdoor fan motor
Direction
changing
18 U7
malfunction of
4-way valve
Communication
malfunction
19 P6
between main
control and drive
Malfunction of
outdoor main
20 EE
control memory
Origin of
name malfunction signal
Evaporator
temperature,
condenser
temperature
Outdoor fan motor
4-way valve
Communication
between main
control board and
drive board
Outdoor main
control board
chip
Control description
If outdoor unit detects that the tube temperature is higher than
protective temp. value, the unit will report overload protection.
The unit will not restart operation until tube temperature is lower
than the protective temp. value and the compressor is stopped for
3min. If the protection occurs over 6 times, the unit cannot be
recovered automatically. Switch off the unit or re-energize the unit
after cutting off power to eliminate this protection.
If the outdoor unit does not receive signal from outdoor fan motor
for 30s successively when the fan motor is operating, outdoor fan
motor malfunction will be reported. In this case, the unit can
automatically resume operation after stopping. If the malfunction
occurs 6 times within one hour, the unit cannot be recovered
automatically. Switch off the unit or re-energize the unit after
cutting off power to eliminate this malfunction.
After the compressor starts operation in heating mode, if the
outdoor unit detects
temperature and indoor ambient temperature is lower than the
protective value for 10min successively, direction changing
malfunction of 4-way valve will be reported and the outdoor unit
will stop operation. The unit can automatically resume operation
in the first two malfunctions. If the malfunction occurs 3 times, the
unit cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this
malfunction.
If the outdoor main control board does not receive data from drive
board, communication malfunction between main control and
drive will be reported. This malfunction can be eliminated
automatically.
If the memory chip of outdoor main control board is broken, the
unit cannot be started. The unit cannot be recovered
automatically. If the malfunction cannot be eliminated after
switching off the unit and then energizing the unit for several
times, please replace the outdoor main control board.
43
the difference between evaporator