Symptoms And Parts To Inspect - Sanyo Big PACi 18 Series Technical Data & Service Manual

5-3. Symptoms and Parts to Inspect

Remote
Alarm
controller
contents
alarm display
P03 Abnormal discharge
temperature error.
Discharge temp.
detected at or
above the specified
value.
P05 Missing phase
detected.
(CT disconnected
or AC power supply
error)
Insufficient gas level
P15
detected.
P19 4-way valve locked
trouble.
Judged after 5
minutes had
elapsed since the
compressor was
switched on.
High-pressure
P20
protection error
caused by cooling
high-load max
(C1, C2)
temperature.
P22
Outdoor unit fan
motor trouble.
Inverter protection
circuit was
activated, or lock
was detected at
outdoor unit fan
motor.
P26 Inverter protector
circuit was activated.
G-Tr short-circuit
within the HIC
circuit.
(Short time / 0.8
seconds or less)
HIC temperature
protection
Judgement conditions
Stops when temp. exceeds
115 .
Alarm output on 4 pre-trips.
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.
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.
When the above has continued
for 1 minute.
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
Halted if the temperature
exceeds 64 .
Error output on 4 consecutive
pre-trips.
Inverter stops after alarm is
detected.
Pre-trip 4 times
Inverter stops after alarm is
detected. Alarm is output
when inverter stops (pre-trip)
consecutively 4 times.
5-5
Eliminating
Judgement and correction
condition of alarm
Recovery at restart 1. Check refrigerant cycle (gas
leak).
2. Trouble with electronic
expansion valve.
3. Check discharge
temperature sensor (TD).
Recovery at restart
1. Check R/S/T power supply.
2. Check HIC circuit.
3. Check outdoor unit control
PCB.
Recovery at restart 1. Check refrigerant cycle
(gas leak).
2. Trouble with electronic
expansion valve.
3. Check outdoor unit valve
opening.
Recovery at restart
1. Check 4-way valve.
2. Check 4-way valve wiring.
3. Check outdoor unit control
PCB.
Recovery at restart
1. Overload operation of
refrigerant cycle.
2. Check outdoor unit heat
exchanger temperature
sensor C1 and C2.
Recovery at restart 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.
Recovery at restart 1. Stops immediately even
when operations restarted.
Layer short on the
compressor
2. Check HIC circuit.
Wiring trouble
3. Heat sink and PCB (HIC)
Contact trouble
Temperature
dropped
5