Installation, Operation & Maintenance | HTV/HTD/HTH SERIES | Heat Controller, Inc. |
CXM Process Flow Chart
WARNING!
WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING.
Failure to disconnect power before servicing can cause severe personal injury or death.
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| Did Unit | |
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| Start? | |
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| Yes |
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| Did Unit | |
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| No |
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See “Unit |
| Yes | Unit Short | |
short |
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| Cycles? | ||
cycles” |
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| No |
CXM Functional Troubleshooting Flow Chart
No |
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| power (see power |
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| problems) |
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Yes |
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| Check fault LED code |
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| on control board |
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| See HP |
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| LP/LOC |
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| Fault |
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No fault
shown
Replace
CXM
See “Only Yes Fan Runs” 
See “Only Yes
Comp
Runs”
See “Does No not Operate 
in Clg”
Only Fan
Runs?
No
Only
Compressor
Runs?
No
Did unit lockout after a period of operation?
No
Does unit operate in cooling?
Yes
See FP2 |
| See |
| See Over/ |
Fault |
| Condensate |
| Under |
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| Fault |
| Voltage |
Yes
Unit is OK!
‘See Performance
Troubleshooting’ for
further help
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