www.johnsonandstarley.co.uk
28
BLOCKING CODES
CODE
SYMPTOM
POSSIBLE CAUSE
ACTION
30
Duct air temperature sensor
short circuit
Temperature sensor shorted to
earth or failed
Check wiring and connections for shorting to earth
Check sensor resistance
31
Duct air temperature sensor
open circuit
Temperature sensor not
connected or failed
Check wiring connections
Check sensor continuity
34
Low mains supply voltage
Electrical supply fault to property
Check incoming mains supply
Faulty wiring to appliance
Check wiring to appliance
43
Return air temperature short
circuit
Temperature sensor shorted to
Check wiring connections not shorting to earth
Check sensor resistance
44
Return air temperature sensor
open circuit
Temperature sensor not
connected or failed
Check wiring connections
Check sensor continuity
45
Flue gas temperature sensor
short circuit
Short circuit in wiring between
sensor and control board
Check wiring to sensor
Check electrical resistance of the sensor
46
Flue gas temperature sensor
open circuit
Temperature sensor not
connected or failed
Check wiring connections
Check sensor continuity
57
Restricted airflow
Blocked filter and return air filter/
Duct
Check blockage from filter and return air filter/
ducts
99
Communication MMI-ESYS lost
Connection between MMI & ESYS
incorrectly made
Check wiring and connections
Содержание WARMCAIR C26D
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