38MGR-04SM Specifications subject to change without notice. 37
DIAGNOSIS AND SOLUTION (CONT)
Communication malfunction between the indoor and outdoor units (E2/E1)
Troubleshooting
ERROR CODE E2/E1
MALFUNCTION DECISION
CONDITIONS
Indoor unit does not receive feedback from the outdoor unit during 120 seconds or the outdoor unit
does not receive feedback from any indoor unit during 180 seconds.
SUPPOSED CAUSES
• Indoor or outdoor PCB faulty
• Wiring mistake
ŽŵŵƵŶŝĐĂƟŽŶŵĂůĨƵŶĐƟŽŶ
ďĞƚǁĞĞŶƚŚĞŝŶĚŽŽƌĂŶĚŽƵƚĚŽŽƌunits
^ƚĂƌƚWŽǁĞƌŽīƚŚĞŶWŽǁĞƌŽŶƚŚĞ
ǁŝƚŚƚŚĞƌĞĂŬĞƌ
ZĞĐŽŶŶĞĐƚƚŚĞƉŽǁĞƌǁŝƌĞ
Is it still displaying the error code?
Yes
No
ŚĂŶŐĞƚŚĞŽƵƚĚŽŽƌƵŶŝƚWĂƐƐĞŵďůLJ
;ŝŶĐůƵĚĞƚŚĞǁŝƌŝŶŐͿ
ŚĞĐŬƚŚĞǁŝƌŝŶŐŽŶƚŚĞŽƵƚĚŽŽƌĂŶĚ
ŝŶĚŽŽƌƚĞƌŵŝŶĂů&ŽůůŽǁƚŚĞǁŝƌŝŶŐĚŝĂŐƌĂŵ
ƌĞƚŚĞǁŝƌĞƐĐŽŶŶĞĐƚĞĚĐŽƌƌĞĐƚůLJ
Yes
No
dƵƌŶŽŶ
ĂůůŝŶĚŽŽƌƵŶŝƚƐǁŝƚŚ
ƚŚĞƌĞŵŽƚĞĐŽŶƚƌŽůůĞƌ
ƌĞĂůůƚŚĞŝŶĚŽŽƌ
ƵŶŝƚƐĚŝƐƉůĂLJĞĚ
Yes
A
No
Yes
A
No
ZĞĐŽŶŶĞĐƚƚŚĞǁŝƌŝŶŐ
ƌĞƚŚĞ
ŝŶĚŽŽƌƵŶŝƚƐ
ŶƵŵďĞƌĐŽƌƌĞĐƚŚĞĐŬ
ƚŚĞŽƵƚĚŽŽƌĐŚĞĐŬƉŽŝŶƚ
;ϮĨŽƌƚǁŽnjŽŶĞϯĨŽƌƚŚƌĞĞnjŽŶĞϰĨŽƌ
ĨŽƵƌnjŽŶĞͿ
Yes
Yes
Yes
ŚĂŶŐĞƚŚĞ/ŶĚŽŽƌW
WŽǁĞƌŽŶǁŝƚŚƚŚĞ
ƌĞŵŽƚĞ/ƐŝƚƐƟůůĚŝƐƉůĂLJŝŶŐƚŚĞ
ĞƌƌŽƌĐŽĚĞĂŌĞƌϯŵŝŶƵƚĞƐ
dƌŽƵďůĞŝƐƐŽůǀĞĚ
No
Yes
ZĞĐŽŶŶĞĐƚƚŚĞǁŝƌŝŶŐ
No
ŚĂŶŐĞƚŚĞ/WD
No
No ZĞĐŽŶŶĞĐƚƚŚĞǁŝƌŝŶŐ
ŚĂŶŐĞƚŚĞKƵƚĚŽŽƌDĂŝŶW
Yes
No
/ƐŵĂŝŶďŽĂƌĚ
ůĂŵƉŽŶ
Turn o all the indoor units.
Is the IPM power LED or operating
LED lamp on?
Is the reactor
well connected?
DĞĂƐƵƌĞsƐŝƐŝƚŵŽǀŝŶŐ
ĂůƚĞƌŶĂƚĞůLJďĞƚǁĞĞŶƉŽƐŝƟǀĞǀĂůƵĞ
ĂŶĚŶĞŐĂƟǀĞǀĂůƵĞsƐŝƐ
ƚŚĞǀŽůƚĂŐĞďĞƚǁĞĞŶ^ĂŶĚ>Ϯ
/ƐƚŚĞǁŝƌŝŶŐďĞƚǁĞĞŶ
ƚŚĞƚĞƌŵŝŶĂůĂŶĚƚŚĞŝŶĚŽŽƌW
ĐŽŶŶĞĐƚĞĚǁĞůů
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