Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

9.3.2.10 High temperature protection of condenser (ODU P6)

When outdoor pipe temp. is mroe than 149°F (65°C), the unit will stop, and will run again when outdoor pipe temp. is less than 126°F (52°C).

High temperature

protection of condenser

Check whether the

condenser temperature is

more than 149°F (65°C)

Yes

Check whether the

outdoor ambient temperature is

higher than 122°F (50°C)

No

Replace the temperature sensor

No

No

Check whether the

 

 

 

 

 

 

 

 

 

 

 

 

 

resistance of condenser

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

Replace outdoor main board

 

 

 

 

 

 

 

temp. sensor is correct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

refer to the Appendix 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

Stop the unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check whether the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

Clean the heat exchanger

 

 

 

 

heat exchanger is dirty

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The refrigerant

 

 

 

 

 

 

 

 

Evacuate the refrigerant, then use the

 

 

 

 

 

 

 

 

 

 

high pressure nitrogen or refrigerant to

 

 

 

 

Yes

 

 

 

 

 

 

 

circuit is blocked

 

 

 

blow out the pipes, vacuum and recharge

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the refrigerant again

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

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Heat Controller A-VMH36QC-1, A-VMH27TC-1, A-VMH18DC-1 service manual High temperature protection of condenser ODU P6

A-VMH18DC-1, A-VMH36QC-1, A-VMH27TC-1 specifications

The Heat Controller A-VMH series, consisting of models A-VMH27TC-1, A-VMH36QC-1, and A-VMH18DC-1, represents a sophisticated range of advanced heating and cooling systems designed for residential and commercial applications. These units are engineered to provide efficient climate control, ensuring optimal comfort throughout the year.

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In summary, the Heat Controller A-VMH27TC-1, A-VMH36QC-1, and A-VMH18DC-1 are ideal choices for anyone seeking efficient, reliable, and smart climate control solutions. With their combination of energy efficiency, advanced filtration, smart capabilities, and robust design, these units meet the diverse needs of modern living and ensure lasting comfort in any environment.