Toyotomi CFT 35 INV-Ri Service Manual page 53

2. E2 malfunction
Communication malfunction between indoor IC and outdoor IC
Judge 1: Check whether the indoor unit power is on
Judge 2: Check whether the signal wiring is shield cable or whether
the shield cable is earthed
Judge 3: Check whether the signal wiring between the indoor and
outdoor units is wrong polarity?
Judge 4: Check whether the signal wiring between the indoor and
outdoor units is broken?
Indoor or outdoor main board is broken. Replace the main
board until the malfunction disappears.
E2 display
Yes
Yes
No
No
No
Turn on the indoor unit power
No
Adopt the shield cable/ let shield cable earthed
Yes
Connect the signal wiring correctly
Yes
Replace the broken wiring
TLC-I-2011.1
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