Heat Controller HEV Series Installation, Operation & Maintenance Manual page 43

Heat Controller, Inc.
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.
See " Unit
Yes
short
cycles"
Yes
See " Only
Fan Runs"
See " Only
Yes
Comp
Runs"
See " Does
No
not Operate
in Clg"
DXM2 PROCESS FLOW CHART
DXM2 Functional
Start
Troubleshooting Flow Chart
Did Unit
No
Attempt to
Start?
Yes
Did Unit
Yes
Lockout at
Start-up?
No
Unit Short
Cycles?
No
Only Fan
Runs?
No
Only
Compressor
Runs?
No
Did unit lockout
Yes
after a period of
operation?
No
Does unit
operate in
cooling?
Yes
Unit is OK!
'See Performance
Troubleshooting' for
further help
HEV/H SERIES
Check Main
power (see power
problems)
Check fault LED code
on control board
See
See HP/
HPWS LP/LOC
Fault
Fault
See LT2
Condensate
Fault
43
Installation, Operation & Maintenance
See LT1
Fault
See See Over/
Under
Fault Voltage
No fault
shown
Replace
DXM2