Sanyo KH3672R / C3672R Benutzerhandbuch

IV-5

SM831148

P03

P05

P04

P15

P19

P20

P22

P26

Abnormal discharge 
temperature

• Discharge temp. 

detected at or 
above the specified 
value.

Stops when temp. exceeds 
232 ˚F.

Recovery at restart

Recovery at restart

Recovery at restart

Recovery at restart

Recovery at restart

Recovery at restart

Recovery at restart

Recovery at restart

1. Check refrigerant cycle 

(gas leak).

2. Electronic control valve 

trouble

3. Check tubing sensor (TD).

Missing phase 

High pressure 
switch is activated.
Compressor motor 
thermal protector is 
activated.

detected. (CT 
disconnected or AC 
power trouble)

Current value sent from MDC 

Stops when pressure 
exceeds 600 psi.
Stops when temp. exceeds
230 ˚F.

on outdoor unit control PCB is 
low.
No AC power input for 3 
minutes or longer: pre-trip - 5

1. Check R/S/T power.
2. Check inverter control PCB.
3. Check outdoor unit control 

PCB.

Insufficient gas level 
detected.

The following conditions 
continue for 1 minute.
• Discharge temp. is 203 ˚F or 

higher.

• Electronic control valve is at 

step 480.

• Current value from MDC is 

2.0 A or less.

Check refrigerant cycle 
(gas leak).

4-way valve locked
• Judgment occurs 

after compressor 
has been ON for 5 
minutes.

Indoor heat exchanger temp. 
drops although compressors 
are ON in heating mode:
  [min(E1, E2)] 

≤ 50 ˚F.

Indoor heat exchanger temp. 
rises although compressors are 
ON in cooling mode:
E2

≥ 104 ˚F.

1. Check 4-way valve.
2. Check 4-way valve wiring.
3. Check outdoor unit control 

PCB.

High-pressure
protection trouble 

1. Refrigerant cycle 

overload operation

2. Outdoor coil temperature 

sensor C1 or C2

Outdoor unit fan 
motor trouble
• Inverter protection 

circuit was 
activated, or lock 
was detected, at 
outdoor unit fan 
motor.

Inverter stops after alarm is 
detected

1. Position detection trouble
2. Overcurrent protection 

circuit at outdoor unit fan 
motor was activated.
•  Check outdoor unit control 

PCB.

•  Refer to outdoor unit fan 

judgment methods.

Inverter protection 
circuit was 
activated, or G-Tr 
short-circuit (short 
time: 0.8 s or less) 
in inverter control 

Inverter stops after alarm is 
detected. Alarm is output 
when inverter stops (pre-trip) 
consecutively 4 times.

1. Stops immediately when 

restarted.
•  Layer short in the 

compressor

2. Check inverter control 

PCB.
•  Wiring trouble

1. Check the high pressure 

switch connector is 
securely connected.

2. Check the ourdoor unit heat 

exchanger is not clogged 
(cooling operation).

3. Check the indoor unit air 

filter has not become 
clogged (heating operation)

If MAX (C1,C2) is 142

°F or 

higher, the compressor stops 
one. The compressor restarts 
three time, and if the 
temperature does not 
decrease to less than 142

°F, 

the alert “P20” is displayed.