Hyundai HRP-S09WH Service Manual page 67

Troubleshooting Troubleshooting
Diagram 6 , 7, 8:
Main check points:
●Is the connection between control panel AP1 and compressor COMP secure? Loose? Is the connection in correct order?
●Is the voltage input of the machine within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT)
●Is the compressor coil resistance normal? Is the insulation of compressor coil against the copper tube in good condition?
●Is the working load of the machine too high? Is the radiation good?
●Is the charge volume of refrigerant correct?
Fault diagnosis process:
Energize and
switch on
IPM protection
occurs after the
machine has run for
a period of time?
Please confirm:
1. If the indoor and
outdoor heat
exchangers are
dirty? If they are
obstructed by other
objects which affect
the heat exchange
of indoor and
outdoor unit.
2. If the indoor and
outdoor fans are
working normally?
3. If the environment
temperature is too
high, resulting in
that the system
pressure is too high
and exceeds the
permissible range?
4. If the charge volume
of refrigerant is too
much, resulting in
that the system
pressure is too high?
5. Other conditions
resulting in that the
system pressure
becomes too high.
Refer to the
Electrical Wiring
Diagram and check
if the connection
between AP1 and
COMP is loose and if
the connection order
is correct.
If the connection
between AP1 and
COMP is unsecure
or the connection
order is wrong?
Use ohmmeter to
measure the resistance
between the three terminals
on compressor COMP, and
compare the measurements
with the compressor
resistance on Service Manual.
Use ohmmeter to
measure the resistance
between the two terminals
of compressor COMP and
copper tube.
64
Use AC voltmeter
to measure the
Y
voltage between
terminal L and N
on the wiring
board XT)
Voltage between
Y
the two ends of celectrolytic
capacitor is
higher than
250V
N
Stop the unit and
disconnect the power
supply. Then, check
the connection of
capacitor C2
according to Electrical
Wiring Diagram.
Remove the wires
on the two ends of
capacitor C2. Then,
use capacitance
meter to measure
the capacitor C2.
Verify as per the
Parameters Sheet.
If capacitor
C2 is failed?
N
If there is any
abnormality
described above?
N
Connect the control panel
AP1 and compressor
Y
COMP correctly according
to the Electrical Wiring
Diagram. Then, energize
and start the unit.
If the
resistance is
normal?
Resistance higher
than 500MΩ?
Replace the
control panel
If the voltage
between terminal L
and N on wiring board XT
is within 210VAC~
250VAC?
Y
Restart the unit. Before
protection occurs,
use DC voltmeter to
measure the voltage
between the two
ends of electrolytic
capacitor on control
panel AP1
The connection
of capacitor C2
is loose.
No
Stop the unit and
disconnect the power
supply. Wait 20 minutes,
or use DC voltmeter to
measure the voltage
between the two ends of
capacitor C2, until the
voltage is lower than 20V
Replace the capacitor
Y
C2. Then, energize
and start the unit.
Replace the
control panel AP1
Take corrective actions
Y according to Technical
Service Manual, and
then energize and start
the unit.
Replace the
control panel AP1
If the unit can
normally?
Replace the
N
compressor
COMP
N
Y
AP1
END
Check the supply
voltage and
N
restore it to
210VAC~250VAC
If the unit can
N
work normally?
Reconnect the
capacitor C2 according
to Electrical Wiring
Y
Diagram. Then,
Restart the
unit.
If the unit can
N
work normallv?
If the unit can
work normally?
N
If the unit can
work normally?
N
Y
work
Y
Y
Y
Y