Troubleshooting by Indication on the Remote Controller
SiUS30-1301
210
Service Diagnosis
3.34 Inverter Over-Ripple Protection
Error Code
P1
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
Imbalance in supply voltage is detected in PCB.
Error Decision
Conditions
When the amplitude of the ripple exceeding 6V is detected
Error is not decided while the unit operation is continued.
"
P1
" will be displayed by pressing the inspection button.
Supposed
Causes
Open phase
Defective inverter PCB
Voltage imbalance between phases
Defective K1, K2
Defective main circuit capacitor
Improper main circuit wiring
Troubleshooting
Note:
1: Measure voltage at the X1M power supply terminal block.
2: Measure voltage at terminals R, S and T of the diode module inside the inverter PCB while the
compressor is running.
Imbalance in
supplied voltage is in
excess of 6 V.
(
∗
1)
Is the
voltage
imbalance applied to the
inverter in excess of
6V?
(
∗
2)
Open phase?
Open phase
Normalize the field cause.
Repair power supply
voltage imbalance.
Parts or wiring defect
After turning the power supply
OFF, check and repair the
main circuit wiring or parts.
(1) Loose or disconnected
wiring between power
supply and inverter
(2) K1, K2 contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
Using a device capable of
constant recording of power
supply voltage record power
supply voltage between 3
phases (R-S, S-T, R-T) for
about 1 continuous week.
No abnormalities are
observed in the
power supply, but the
imbalance in voltage
recurs.
Give the user a copy of "notification of inspection results" and leave
it up to him to improve the imbalance.
Power supply voltage
imbalance.
Even if the power supply voltage
is not unbalanced when
measuring it, there are many
cases where it gets unbalanced
during night-time (around
6:00PM to 10:00PM).
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
Replace the inverter PCB.
<When voltage monitoring is possible:>
measure
Explanation for users
∗
In accordance with "notification of inspection results" accompanying spare parts.
NO
NO
NO
YES
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.