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6.6 Troubleshooting for automatic PTI (J-code)
Step Content Alarm
code
Judgment Possible cause Check method
P00 Basic data record No
indication
No judgment
Same as normal operation Same as normal
operation
P04 Power supply
check
No
indication
Same as normal
operation
Same as normal operation Same as normal
operation
Same as normal operation Same as normal
operation
P06 HPS check
(Indoor fan stops)
J061
Abnormal OFF point
(1) HPS malfunction
(2) High pressure transducer
(HPT) malfunction
(1) Check HPS
(2) Compare to Gauge
manifold
J062 Not return
J064
High pressure does
not rise.
(HPS does not operate
within 5 minutes)
Leakage from liquid solenoid
valve due to dust pinched with
the valve seat part.
Leakage from hot gas by-pass
solenoid valve due to dust
pinched with the valve seat part.
Touch the outlet pipe of
the solenoid valve.
Leakage from defrost solenoid
valve due to dust pinched with
the valve seat part.
Touch the outlet pipe of
the solenoid valve.
P08 Pump down check
(LSV : OFF)
J081 Pump down
requires too long
time.
(The pressure
does not reach
LPT < 0KPa in
two minutes.)
Leakage from discharge gas by-
pass solenoid valve due to dust
pinched with the valve seat part.
Touch the outlet pipe of
the solenoid valve.
Hot gas by-pass valve
malfunction
Check hot gas by-pass
valve
P10 Solenoid valve
check
(Unit stops)
J101
Excessive leakage
of solenoid valve
(LP increases
above 200Kpa
within 2 minutes)
Injection valve malfunction Check Injection valve
P12 RS, SS accuracy
check
(Indoor fan stops)
J121
Excessively large
temperature difference
between RS and DRS
Excessively large
temperature difference
between SS and DSS
(△T is within 1.2°C)
SS malfunction Compare the SS with
the DSS on the
controller panel.
RS malfunction Compare the RS with
the DS on the controller
panel.
P14 HPT, LPT
accuracy check
(HSV : ON)
J141
Excessively large
pressure
difference between
HPT and LPT
(△P is within
100Kpa)
HPT malfunction
Compare the high pressure valve
with the gauge manifold of HPT
(on the controller panel).
LPT malfunction
Compare the low pressure
valve with the gauge manifold
of LPT (on the controller panel)
Evaporator fan and motor
malfunction.
Magnetic contactor (EFH/L)
and wiring malfunction.
Check Evaporator fan and
motor.
Check magnetic contactor
(EFH/L) and wiring.
P02 Alarm check on all
sensor
Same as
normal
operation
Same as normal
operation
P05 Compressor start
running Check
J051 Same as normal
operation
J065
High pressure does not
drop.
(HPS does not reset
within 5 minutes)
P16 Evaporator fan
Hi/Lo speed
operation check
J161
Abnormal operation of
evaporator fan speed
(Hi should be higher
speed than Lo.)
Low pressure transducer (LPT)
malfunction
Compare with pressure
gauge
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