Part 4 Trouble Shooting

Error code

Description

Cause of error

 

 

 

 

Heat-sink Temp. is over

Heat-sink thermistor is damaged(short or open).

 

 

 

 

 

95°C(203°F)

°

°

F)

4

 

Heat-sink Temp. is over 95 C(203

 

Heat-sink thermistor

 

 

 

 

• Damage or defect on the sensing circuit of outdoor pcb assembly.

 

is open or short

 

 

(R01H, R02H, C01H)

 

 

 

 

 

 

 

Check flow

Heat-sink thermistor is connected to outdoor PCB assembly?

YES

Heat-sink thermistor in INV-IC is Right ?

YES

Sensing circuit of outdoor pcb is right ?

No

No

No

-Connect to CN-TH2 in outdoor PCB assembly

Check heat-sink thermistor

-Measure resistance of thermistor (about 10kat 25°C(77°F))

-Check soldering state of R01H, R02H, C01H

9k,12kBtu/h Model Heat-sink Thermistor resistance check

Resistance[k]

R-T Graph

120

100

80

60

40

20

0

20 30 40 50 60 70 80 90 100 110 120 130 [˚C]

6886 104 122 140 158 176 194 212 230 248 266 [˚F] Temperature

- 49 -

Only for training and service purposes

Page 49
Image 49
Heat Controller VMC12SB-1/VMH12SB-1, VMC09SB-1/VMH09SB-1 service manual Description Cause of error Heat-sink Temp. is over

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