5. Trouble Shooting
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Purpose
Judge whether the 4-way valve part
has any fault.
Items for checking
1. Check the working voltage of the 4-way
valve.
2. Check the 4-way valve coil resistance.
! Caution
: When the measurement is made in the state that the electricity is applied, check the tester
for being in the measurement mode and be careful to avoid possible short of the parts other
than the measuring part.
❈
The measurement should be made at the time to start heating mode operation and at the time of
standby after operation.
■
Checking the output voltage of CN-4way (refer to next page)
■
Check the 4-way.valve coil resistance.
1. Set the tester in AC Voltage Mode and check the voltage.
2. Check the output voltage between both ends of CN-4Way Connector.
3. The standard of normal voltage is 220 V ±10 %.
4. If the measurement is different from the standard, replace PCBA.
1. Set the tester in Resistance Mode and check the current.
2. Measure the resistance between the both ends of a single unit of 4-Way valve coil.
3. The standard of normal resistance is 14
j
Ω ±10 %.
4. If the measurement is different from the standard, replace 4-Way valve coil.
4-Way Valve Check
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
