Heat Controller VMH09SC-1 Service Manual page 37

Heat Controller, Inc.
E1:
9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution
Turn off the power supply, after 1 minute, reapply the
power, turn on the unit with remote controller
Check the wiring between indoor and outdoor
unit. Is the connection of L, N, S and GND good?
Is the LED4(red) bright and LED1(yellow)
blinking on outdoor PCB?
Problem with power supply for outdoor
PCB. Check the wiring on outdoor PCB
and compare with wiring plate. Is the
connection good?
Correct the connection
Does E1 code clear
Yes
No
No
VMH SerieS
No
Yes
Replace indoor PCB and repower
Yes
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37
Reconnect and retest
The unit does not
work normally
Replace outdoor e-box. Replace the outdoor e-box
Service Manual