P25 OF 36
P26 OF 36
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Pd
Current checking-connection error (U-V-W not connected accordingly)
TBD
PE
Temperature sensor drifting protection
TBD
PF
Driving board-ambient temperature sensor error
TBD
PH
DC incoming voltage too high (program checking)
Cooling LED-Off 3S, Blinks 11 times
PL
DC incoming voltage too low (program checking)
Cooling LED-Off 3S, Blinks 21 times
PP
AC incoming power abnormal (too low or too high)
TBD
PU
Capacitor-charging circuit error
Heating LED-Off 3S, Blinks 17 times
U7
4-way switch valve abnormal
Heating LED-Off 3S, Blinks 20 times
U6
Oil temperature too high
Heating LED-Off 3S, Blinks 16 times
U4
Compressor rotation reversed
Heating LED-Off 3S, Blinks 14 times
U5
Rectifying current checking error
Heating LED-Off 3S, Blinks 13 times
U3
DC main bus voltage drop
Heating LED-Off 3S, Blinks 20 times
U1
Compressor phase current checking circuit error
Heating LED-Off 3S, Blinks 13 times
U2
Compressor phase loss protection
Heating LED-Off 3S, Blinks 12 times
UC
Filter needs to be cleaned
TBD
U8
PG motor (indoor) checking circuit error
Running LED-Off 3S, Blinks 17 times
U9
Outdoor fan motor checking circuit error
Running LED-Off 3S, Blinks 18 times
UF
De-actuate remote or control, from a long distance
TBD
C7
PTC heater sensor error
Heating LED-Off 3S, Blinks 9 times
FJ
Discharge/vent air temperature sensor error
TBD
L8
Storage tank water level switch error
TBD
d3
AC condensate: anti-freezing sensor error
TBD
d4
Domestic water: anti-freezing sensor error
TBD
d5
Return water sensor error
TBD
d6
Defrost coil sensor error
TBD
d7
Back-up hot water temperature sensor error
TBD
d8
Hot water outlet temperature sensor error
TBD
d9
Hot water inlet temperature sensor error
TBD
db
Temp. Sensor Error-after metering device (cap. Tube, or EXV)
TBD
dc
Temp. Sensor Error-suction tube
TBD
dP
Temp. Sensor Error-discharge tube
TBD
dL
Low voltage reluctance/reluctor error
TBD
L9
Compressor Protection-calculated input is too high
Running LED-Off 3S, Blinks 20 times
dF
Temp. Sensor Error-solar water heater-water outlet
TBD
dH
Temp. Sensor Error-solar water heater-assistant ele. heater
TBD
dU
Door-lock sensor: card is not in
TBD
dJ
AC phase protection (lost or reversed)
TBD
d0
Fan motor speed communication error
TBD
Eo
Specia function board error
TBD
dn
M ulitiple zone-pipe connection doesn't match with comm. wire connection TBD
Cn
Not for AC: Buring gas density too high
Cooling LED-Off 3S, Blinks 23 times
Fn
Not for AC: Buring gas sensor error
Running LED-Off 3S, Blinks 21 times
HP
Solar AC: solar power input voltage is higher than 180V
TBD
dA
AHU or RT: discharge air-relative humidity sensor error
TBD
dE
AHU or RT: fresh air-relative humidity sensor error
TBD
Fr
AHU or RT: fresh air-temp. sensor error
TBD
UA
DC inverter driving error 1
TBD
dr
AHU or RT: air flow pressure sensor error
TBD
Ub
DC inverter driving error 2
TBD
Ud
DC inverter driving error 3
TBD
UE
DC inverter driving error 4
TBD
LU
Compressor power input limit / decrease HZ (system power input)
Cooling LED-Off 3S, Blinks 24 times
LA
Outdoor unit fan motor protection (not rotating, or not connected). If 2
motors, motor 1-L3, motor 2-LA
Running LED-Off 3S, Blinks 24 times
A5
Condensing coil-inlet temp. sensor error (=F5 in commercial units)
TBD
A7
Condensing coil-outlet temp. sensor error (=F7 in commercial units)
TBD
e4
Compressor dischage temp. (=pressure) too high
TBD
e8
Over-load protection (outdoor coil temp. too high)
TBD
e1
Dicharge pressure sensor error
TBD
ee
DC inverter driving chip error
TBD
JF
Indoor unit-testing board comm. Error (after 3-minutes)
TBD
rF
RF module error (once powered, the MCU tries to send commands, via SPI,
to RF, if RF doesn't receives it, error shows)
TBD
Uu
Solar AC: battery bank discharged too much and the output voltage is lower
than 295V
TBD
no
For VRF groups: DC unit's display board can not receive any data from the
fixed speed comp. unit, will show "no" after 8 seconds
TBD
E6+IDU
Temp.
Communication error (ID display-OD main board) and outdoor temperature
sensor error
TBD
E7+ODU
Temp.
Communication error (ID unit-OD unit) and outdoor temperature sensor
error
TBD
Fu
AHU or RT: dust sensor error
TBD
ERROR AND PROTECTION CODE SUMMARY
ERROR AND PROTECTION CODE SUMMARY
Notes
:
1.Some codes are not malfunctions and will not require you to do anything, since the unit will resume normal
functions once the unit finishes its designated work such as defrost, oil return...
2.Some other codes denote malfunctions and the unit will not resume normal functions until your technician
checks your unit and fixes the problems such as dirty coils, clogged filters, bad control boards...You can
have your technician to call 866-833-3138 for help of technical support and trouble-shoot.
Notes
:
1.Some codes are not malfunctions and will not require you to do anything, since the unit will resume normal
functions once the unit finishes its designated work such as defrost, oil return...
2.Some other codes denote malfunctions and the unit will not resume normal functions until your technician
checks your unit and fixes the problems such as dirty coils, clogged filters, bad control boards...You can
have your technician to call 866-833-3138 for help of technical support and trouble-shoot.
UNIT MAINTENANCE &
SER
VICE GUIDE
UNIT MAINTENANCE &
SER
VICE GUIDE
