H07 Compressor Oil Depletion Error (For Only W Multi - Panasonic 2WAY Multi Technical & Service Manual

H07 Compressor Oil Depletion Error (for only W MULTI)

Error detection method
Each outdoor unit is inspected for lack of oil and when the oil level is 0 (insuffi cient) for 20 minutes, the engine
stops.
• An H07 failure is assumed when the engine has stopped due to insuffi cient oil a total of 8 times.
• This cumulative count clears when the oil level becomes 1 (normal) or 2 (suffi cient).
Troubleshooting
1 Is the cooler being operated when the outside temperature
Gas shut-off is 5°C or less (or is there any evidence of this)? (If there
1-1
valve check is only one outdoor unit, this is "No" regardless of outside
temperature.)
1-2 Is the gas shut-off valve (optional) correctly connected?
2
Is the temperature sensor for measuring the oil level
Sensor
2-1 correctly installed? (Must be no disconnected or fl oating
sensors.)
Are the characteristics of the temperature sensor for
2-2 measuring the oil level normal? (Temperature sensor:
Check the TH11 resistance value.)
Are the measurement results of the temperature sensor
for measuring the oil level valid?
* Compare the No. 26 value displayed on [No.00] on the
2-3
3 Operate the outdoor unit and check the temperature of the
Regular oil regular oil return circuit. Is the temperature rising?
return circuit * Check the temperature at the top of the capillary on the
check
3-1
* Although results will differ in accordance with conditions,
4 Is the dry coil blocked?
Dry core check 4-1 * Operate the heater and check the temperature
5
Is the suction strainer blocked?
Suction strainer
5-1 (It is especially important to check this on renewal-
check
dedicated units.)
6
Compressor oil 6-1 Replenish 4 L of compressor oil (for the entire system) and keep an eye on the situation.
replenishment
Note: The solenoid valve coils and the vicinity can become very hot so check operations should be performed
with care.
outdoor unit's main board (temperature measurement for
the oil level) with the actual temperature measured with a
thermometer or other tools.
oil return circuit (near the temperature sensor for the oil
level) directly with a thermometer or other tools, or check
the fl uctuations in temperature displayed for the oil level
on the outdoor unit's main board.
the temperature will clearly rise approximately 5 to 10
minutes after the engine has been started up under
normal circumstances.
differences at the dry core's inlet and outlet.
IV–66
Yes 1-2
No 2-1
Yes 2-1
Connect the gas shut-off
No
valve
Yes 2-2
Resecure the
No temperature sensor in
place
Yes 2-3
Replace the temperature
No
sensor
Yes 3-1
Replace the outdoor
No
unit's main board
Yes 4-1
Replace the regular oil
No
return circuit
Yes 5-1
No Replace
Yes 6-1
No Replace