Kaisai 06RY1, Service Manual

Page: 69 / 114

M thermal Mono
68 200208
Midea
M
ther
ma
l Mo
no
Se
rvice M
an
ual
4.12 H6, HH Troubleshooting
Digital display output 4.12.1
Description 4.12.2

H6 indicates a DC fan error.

HH indicates that H6 protection has occurred 10 times in 2 hours. When an HH error occurs, a manual system
restart
is required before the system can resume operation. The cause of an HH error should be addressed promptly
in order to avoid system damage.

Mono stops running.

Error code is displayed on refrigerant system main control board for refrigerant system and user interface.
Possible causes 4.12.3

Power or communication wires not connected properly.

High wind speed.

Fan motor blocked or has failed.

Power supply abnormal.

PFC module damaged.

IPM module damaged.

Main PCB damaged.
Midea CAC Confidential
M thermal Mono
202008 69
Procedure 4.12.4
H6 / HH
Strong wind is blowing towards the
fan, making the fan running in the wrong
direction
Yes
Changer the outdoor unit’s installation
direction or build a shelter to protect the
fan from strong wind
No
Some power wires or communication
wires of fan are not connected properly
1
Yes
Ensure power and communication wires
are connected properly
No
The fan motor is blocked or has failed
Yes
Remove obstruction or replace the fan
motor
No
The power supply is abnormal
Yes
Check the power supply equipment
No
The PFC module is damaged
2
Yes
Replace PFC module
No
The IPM module is damaged
3
Yes
Replace IPM module
No
Replace refrigerant system main PCB
Notes:
1.
Refer to Figures 4-1.1 to 4-1.7 in Part 4, 1 “Outdoor Unit Electric Control Box Layout” and to the Mono Engineering Data Book, Part 2, 5 “Wiring
Diagrams”.
2.
Only applies to single-phase power supply models. Check the voltage between “+” and “-” terminals on the PFC module on the inverter module.
The normal range is 277V to 354V. If the voltage is outside this range, the PFC module is damaged.
3.
Measure the voltage between the DC fan motor power supply’s white and black wires. The normal voltage is 15V when the unit is in standby. If the
voltage is significantly different from 15V, the IPM module on the inverter module is damaged. The fan connections on each type of refrigerant
system main control board for refrigerant systemre labelled in Figures 4-2.2, 4-2.4 and 4-2.6 in Part 4, 2.3 “Main PCBs for Refrigerant System,
Inverter Modules and Filter Boards”.
Midea CAC Confidential
Mono