Caution For Diagnosis; Problem Symptoms And Measures; Error Codes And Description - Haier H2SM-(9+12)HEK03/R2 Service Manual

7.1 Caution for Diagnosis

1.When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions,
disabling equipment operation.
2.When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct
the diagnostic procedure described in the following pages.

7.2 Problem Symptoms and Measures

Symptom Check Item
None of the units
Check the power supply
Check the indoor PCB
is operates
Operation
Check the power supply
sometimes stops.
Check for faulty operation of the
Equipment operates but
electronic expansion valve.
does not cool, or does not
heat (only for heat pump)
Diagnosis by service port pressure
and operating current.
Large operating noise
Check the installation condition.
and vibrations

7.3 Error Codes and Description

Code indication
Indoor
E1
E2
Indoor
E4
Malfunction
E7
E14
F6
Outdoor
F7
F7
Malfunction
F12
H2SM-(9+12)HEK03/R2
Details of Measure
Check to make sure that the rated voltage is supplied
Check to make sure that the indoor PCB is broken
A power failure of 2 to 10 cycles can stop air conditioner operation.
Set the units to cooling operation, and compare the temperatures
of the liquid side connection pipes of the connection section
among rooms to check the opening and closing operation of
the electronic expansion valves of the individual units.
Check to make sure that the required spaces for
provided.
Description
Room temperature sensor failure
Heat-exchange sensor failure
Indoor EEPROM error
Communication error between the indoor and outdoor units
Indoor fan motor malfunction
Outdoor Senistor Error
Outdoor unit A's coil sensor failure
Outdoor unit B's coil sensor failure
Outdoor EEPROM error
48
Service Diagnosis
Outdoor LED1 blinks times
--
--
--
3 or 7
--
2
5
9
1
Domestic Air Conditioner