Pioneer WD Series, Руководство по обслуживанию

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(15) Display P4
Symptom Display P4
Cause Exhaust overtemperature protection
S/N Inspections How to Solve Remarks
1
Check if the air inlet and outlet of
outdoor unit is blocked by any
obstructions.
Install to the position as required in
the Instruction Manual and ensure
the air inlet and outlet of the
outdoor unit is smooth.
2 Check the system for shortage of
refrigerant.
Add refrigerant
3 Check if the exhaust temperature
sensor is drifted, short circuited or
open circuited. (25 /20K
Ω ). For other ℃
resistances, please refer to the Exhaust
Temperature Sensor – Resistance
Sheet)
Replace the exhaust temperature
sensor
Photo 24
4
Control board damaged
Replace the outdoor power source
boar
(16) Display P5
Symptom Display P5
Cause Subcooling protection under cooling mode
S/N Inspections How to Solve Remarks
1
Check if the air inlet and outlet of
indoor unit is blocked by any
obstructions.
Install to the position as required in
the Instruction Manual and ensure
the air inlet and outlet of the
outdoor unit is smooth.
2
Check the system for shortage of
refrigerant.
Add refrigerant
3
Check if the exhaust temperature
sensor is drifted, short circuited or open
circuited. (Measure the resistance of
the resistors on two ends of indoor
temperature sensor: (25 / 5K
Ω ). For ℃
other resistances, please refer to the
Temperature – Resistance Sheet
(Appendix 1).
Replace room temperature sensor
(IRT) and Indoor pipe (coil)
temperature sensor (IPT)
Photo 25
4 Control board damaged Replace the indoor control board
24