Gree GVC48ALXL-M3NTC7A - Page 50

47
Installation and Maintenance
Service Manual
13
Malfunction
protection of
outdoor unit
jumper cap
C4
Cooling: compressor and
outdoor fan stop operation,
while indoor fan operates
Heating: compressor,
outdoor fan and indoor fan
all stop operation
1. Whether a jumper cap is installed
on the mainboard of ODU?
2. Is the mainboard of ODU damaged?
Refer to maintenance
owchart
14
Anti-reverse
protection of
compressor
LE
Cooling: compressor and
outdoor fan stop operation,
while indoor fan operates
Heating: compressor,
outdoor fan and indoor fan
all stop operation
1.Whether gas valve and liquid valve
ODU are open completely?
2.Wheck the refrigerant in the system
leaking?
3. Whether the pipeline of system
blocked?
4. Whether indoor fan and outdoor fan
operate abnormally?
15 Defrosting H1
Heating indicator off for
0.5s and then blinks for
10s
Not the error code. It’s the status code for
the operation
16
Malfunction
of detecting
plate(WIFI )
JF
Loads operate normally,
while the unit can’t be
normally controlled by APP.
1. Main board of indoor unit is damaged;
2. Detection board is damaged;
3. The connection between indoor unit
and detection board is not good;