Current Protection Of Compressor (Odu P3) - Heat Controller A-VMH18DC-1 Service Manual

Service Manual

9.3.2.8 Current protection of compressor (ODU P3)

Current protection of compressor
Check whether the input
current of the power supply
wire is more than 12.5A
(For 27K, it is 14.5A, For
refrigerant system is ok
temperature is higher than
Check whether the outdoor
unit's airflow is obstructed
Check whether the heat
Replace outdoor main
whether the system can
Replace the electrical
36K, it is 20A)
Yes
Check whether the
Check whether the
outdoor ambient
122.4°F (50°C)?
No
No
exchanger is dirty
No
Is the refrigerant
circuit blocked?
No
board, and check
run normally
No
control box
VMH SerieS
Yes Stop the unit
Yes Remove all obstructions for proper ventilation
Yes Clean the heat exchanger
Evacuate the refrigerant, then use
high pressure nitrogen or refrigerant
Yes
to blow pipe, vacuum and recharge
with refrigerant again
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