Sanyo Big PACi 18 Series - 5-3. Symptoms and Parts to Inspect

5-5
5
5-3. Symptoms and Parts to Inspect
Judgement conditions
Eliminating
condition of alarm
P03
P05
P15
P19
P20
P22
P26
Remote
controller
alarm display
Alarm
contents
Judgement and correction
Abnormal discharge
temperature error.
Stops when temp. exceeds
Alarm output on 4 pre-trips.
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Recovery at restart
Temperature
dropped
1. Check refrigerant cycle (gas
leak).
2. Trouble with electronic
expansion valve.
3. Check discharge
temperature sensor (TD).
Missing phase
detected.
(CT disconnected
or AC power supply
error)
The current value transmitted
from the microcomputer on the
outdoor unit control substrate
is low.
When no AC power input for
more than 3 minutes:
Pre-trip 5 times.
1. Check R/S/T power supply.
2. Check HIC circuit.
3. Check outdoor unit control
PCB.
1. Check refrigerant cycle
(gas leak).
2. Trouble with electronic
expansion valve.
3. Check outdoor unit valve
opening.
Insufficient gas level
detected.
When the above has continued
for 1 minute.
4-way valve locked
trouble.
The indoor unit heat exchanger
temperature drops even though
the compressor is switched on
during the heating mode.
[min(E1,E2)] is 10 or lower.
The indoor unit heat exchanger
temperature rises even though
the compressor is switched on
during the cooling mode.
E2 is 50 or higher
Pre-trip 2 times
1. Check 4-way valve.
2. Check 4-way valve wiring.
3. Check outdoor unit control
PCB.
High-pressure
protection error
caused by cooling
high-load max
(C1, C2)
temperature.
Halted if the temperature
exceeds 64 .
Error output on 4 consecutive
pre-trips.
1. Overload operation of
refrigerant cycle.
2. Check outdoor unit heat
exchanger temperature
sensor C1 and C2.
Outdoor unit fan
motor trouble.
Inverter stops after alarm is
detected.
Pre-trip 4 times
1. Position detection trouble.
2. Outdoor unit fan motor
over-current Protection
circuit is activated.
Check outdoor unit
control PCB.
Refer to outdoor unit fan
judgement methods.
Inverter protector
circuit was activated.
HIC temperature
protection
G-Tr short-circuit
within the HIC
circuit.
(Short time / 0.8
seconds or less)
Inverter stops after alarm is
detected. Alarm is output
when inverter stops (pre-trip)
consecutively 4 times.
1. Stops immediately even
when operations restarted.
Layer short on the
compressor
2. Check HIC circuit.
Wiring trouble
115 .
Discharge temp.
detected at or
above the specified
value.
Judged after 5
minutes had
elapsed since the
compressor was
switched on.
Inverter protection
circuit was
activated, or lock
was detected at
outdoor unit fan
motor.
3. Heat sink and PCB (HIC)
Contact trouble
Discharge temperature is
100 or higher.
Electronic expansion valve is
at Step 960.
The current value from the
MDC is 6.0A (three-phase)
/ 3.5A (single-phase) or less.
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