Limitation Setting For Pump Feedback Waiting Time - Hitachi SAMURAI Series Service Manual

2 Control Functions
Control functions on the module

2.1.16 Limitation setting for pump feedback waiting time

Flow at the start of operation of the chiller unit
°
¢
£
The flow in the upper figure is followed upon start of operation of the chiller unit.
The state of ¢ is kept in case that there is no input of pump feedback signal between ¢ and £, or when the difference
between inlet and outlet temperature of cold water is too large. This function shifts to § "Alarm" in case that the state of
¢ continues for a certain amount of time.
Initial value for the standard specification:
• Unlimited
• Initial value for the specification with pump mounted: 5 minutes
• Setting range: 1~30 minutes
The display at this time is
LCD: Pump interlock abnormality
Segment: 5P-5P

Setting method
COOL/HEAT
COOL
33 SMGB0120 rev.0 - 11/2017
Chiller Unit Operation Order Reception
Waiting for Pump Feedback
Interlock achieved
Compressor operation after compressor delay
time count
Select "Limited" and input the time
In case that
setting time is
exceeded
Alarm Output
§
Select "Limited" and input the time
Display the input window with
[INPUT] key
Input the setting value with up
and down keys
Confirm with [ENT] key
Cancel with [CAN] key
2