Mitsubishi Electric PUHY-P200 Service Handbook page 111

Checking code Meaning, detecting method
High pressure
5201 1. When pressure sensor
sensor detects 0.098MPa or less
abnormality during operation, outdoor unit
(outdoor unit) once stops with 3 minutes
restarting mode, and restarts
if the detected pressure of
pressure sensor exceeds
0.098MPa immediately before
restarting.
2. If the detected pressure of
sensor is less than 0.098MPa
immediately before restarting,
error stop is commenced
displaying 5201.
3. Under 3 minutes restarting
mode, LED displays
intermittent fault check.
4. During 3 minutes after
compressor start, defrosting
and 3 minutes after defrosting
operations, trouble detection
is ignored.
5301 ACCT sensor -1.5Arms
5305 abnormality effective value
(Error details detected during inverter
No.115) operation.
DCCT sensor
An abnormal value is detected
abnormality in the DCCT detection circuit
(Error details just before the INV started.
No.118)
✻
Other than
P200 model
An abnormal value was
ACCT
detected with the ACCT
sensor/circuit
detection circuit just before the
abnormality
INV started.
(Error details
No.117)
An abnormal value was
DCCT
detected with the DCCT
sensor/circuit
detection circuit just before the
abnormality
INV started.
(Error details
No.116)
✻
Other than
P200 model
✻
For the check code on the inverter, refer to
(1) Pressure sensor trouble.
(2) Inner pressure drop due to
a leakage.
(3) Broken cover.
(4) Coming off of pin at
connector portion, poor
contact.
(5) Broken wire.
(6) Faulty thermistor input circuit
of MAIN board.
output current's (1) Contact is faulty.
1.5Arms was
(2) ACCT sensor is faulty.
(1) Contact is faulty.
(2) DCCT sensor incorrectly
installed.
(3) DCCT sensor is faulty.
(4) INV board fault.
(1) INV board fault.
(2) Compressor ground fault
and IPM fault.
(1) Contact is faulty.
(2) INV board fault.
(3) DCCT sensor is faulty.
(4) Compressor ground fault and
IPM fault.
"
6. Inverter and compressor
- 109 -
Cause Checking method & Countermeasure
See Troubleshooting of
pressure sensor.
Check the INV board CNCT2
(ACCT) contact, CNDR2 and
G/A Board CNDR1.
Replace the ACCT sensor
Check the connector connection
on the INV board CNCT (DCCT),
DCCT side.
Check DCCT installation
direction
Replace the DCCT sensor
Replace the INV board
Refer to 9.[4].6.(2).[1]
"Check the INV board error
detection circuit"
Refer to 9.[4].6.(2).[2]
"Check for compressor ground
fault or coil error."
Refer to 9.[4].6.(2).[5]
"Check the inverter circuit trouble".
Check the contacts around the
INV board connector CNCT and
DCCT side connector.
Refer to 9.[4].6.(2).[1]
"Check the INV board error
detection circuit".
If there is no problem up to step
(2), replace
DCCT and check the DCCT
polarity.
Refer to 9.[4].6.(2).[2]
"Check for compressor ground
fault or coil error."
Refer to 9.[4].6.(2).[5]
"Check the inverter circuit trouble".
" "
in the section [4] Troubleshooting of principal parts
"