Gree Dettson LOMO 19 Installation Manual page 62

Service Manual
No. Malfunction Name
Voltage for DC bus-bar is
21
too high
Voltage of DC bus-bar is
22
too low
Compressor Min
23
frequence in test state
Compressor rated
24
frequence in test state
Compressor maximum
25
frequence in test state
Compressor intermediate
26
frequence in test state
Overcurrent protection of
27 phase current for
compressor
Installation and Maintenance
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling and drying operation, compressor
will stop while indoor fan will operate;
PH
During heating operation, the complete unit will
stop operation.
During cooling and drying operation, compressor
will stop
PL while indoor fan will operate;
During heating operation, the complete unit will
stop
P0
P1
P2
P3
During cooling and drying operation, compressor
will stop while indoor fan will operate;
P5
During heating operation, the complete unit will
stop operation.
A/C status
1. Measure the voltage of position L and N on
wiring board (XT), if the voltage is higher than
265VAC, turn on the unit after the supply voltage
is increased to the normal range.
2.If the AC input is normal, measure the voltage
of electrolytic capacitor C on control panel (AP1),
if it's normal, There's malfunction for the circuit,
please replace the control panel (AP1)
1. Measure the voltage of position L and N on
wiring board (XT), if the voltage is higher than
150VAC,
turn on the unit after the supply voltage is
increased to the normal range.
2.If the AC input is normal, measure the voltage
of electrolytic capacitor C on control panel (AP1),
if it's normal, There's malfunction for the circuit,
please replace the control panel (AP1)
Showing during min. cooling or min. heating test
Showing during nominal cooling or nominal
heating test
Showing during max. cooling or max. heating test
Showing during middle cooling or middle heating
test
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
Possible Causes
59