Heat Controller B-DVH09SD-0 Service Manual page 33

Heat Controller
10.3.2 Indoor / Outdoor Unit Communication Error Diagnosis and Solution (E1)
Error Code
Malfunction
Possible Causes
Trouble shooting:
Power off, then turn on the unit 5 seconds
later(reconnect the power wire).Is the error
still displaying after several minutes?
Measure Vs, is it moving alternately
Measure Vs,* is it moving alternately
with positive value?
with positive value? (Vs is the voltage
(Vs is the voltage between L2 and S
between L2 and S of outdoor unit.
of outdoor unit. Connect the red pin of
Connect the red pin of multimeter with
multimeter with L2 port, black pin with
L2 port, black pin with S port)*
S port)
Check all the wiring with outdoor
u n i t s . Is the wiring to the outdoor
m a i n PCB connect e d correctly? I s
the reactor connected well?
Measure the resistance of the
Measure the resistance of the reactor
reactor(The one without capacitor).
(the one without capacitor). If is is zero,
If it is zero ,follow the below step. If
follow the step below. If not, replace
not, replace a new reactor.
Replace the outdoor main PCB.
Power on. Is the error extinguished?
Power on. Is the error still displaying?
Replace the indoor main PCB.
*Note: See next page for masuring Vs and the resistance of the reactor.
Note: See next page for measuring Vs and the resistance of the reactor.
E1
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Wiring error
●
Faulty Indoor/Outdoor PCB
●
Yes
Yes
Yes
Yes
with a new reactor.
Yes No
No No further action.
Check all the wiring with indoor units.
Is the wiring to the indoor main PCB
connected correctly?
Yes
Replace the indoor main PCB.
Power on. Is the error extinguished?
Power on. Is the error still displaying?
Replace the outdoor main PCB.
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DVC/DVH Inverter Mini-Split
No
No
Yes