Table of Contents
[ IX Troubleshooting ]
3. Troubleshooting flow chart for LEV, Solenoid valve, 3-way valve, and Water flow rate control valve
(1) LEV
No cooling capacity
No heating capacity
Check whether the electric expansion
valve and the solenoid valve connector
are not disconnected or not loose.
Fault is found.
Run the cooling operation or the heating
operation in the system in trouble
(only in one system).
Cooling-only or Heating-only
Cooling-only
Check that SVM1 is ON.
SVM1 ON
YES
Check that LEV1 and 2 are
controlling the superheat.
Superheat control OK
YES
Check whether LEV3 is controlling
superheat.
Superheat control OK
YES
Check that MCV1 and MCV2 are in the
standard position.
MCV1 and MCV2:
standard position
YES
Check that FCV is controlling the
water temperature difference.
Water temperature control OK
YES
1) Refer to Chapter "Control" for superheat, subcool, and water temperature difference.
HWE1113B
NO
Heating-only
NO
Note 1
NO
Note 1
NO
NO
NO
Completed
Repair the fault.
Check SVM1.
Check LEV1.
Check LEV3.
Check MCV1 and MCV2.
Check FCV.
- 218 -
Check that SVM1 is OFF.
NO
SVM1 OFF
YES
NO
Subcool control OK
YES
Check that LEV3 is fully open.
NO
LEV3: fully open
YES
Check that MCV1 and MCV2 are in the
standard position.
NO
MCV1 and MCV2:
standard position
YES
Check that FCV is controlling the
water temperature difference.
NO
Water temperature control OK
YES
Note 1
Note 1
GB

Hide quick links:

Table of Contents
loading

This manual is also suitable for:

Wp250yjm-aCmb-wp108v-g

Table of Contents