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SECTION 7 – MAINTENANCE
Refrigerant Pump Manual Stop
The refrigerant pump can be stopped manually for
maintenance purposes. It can be stopped even while
the chiller-heater is operating.
1. Navigate to the Control Panel Setting screen.
2. Press the Refrigerant Pump Stop button
After maintenance of the purge system
is complete, be sure to reset it to Auto.
Continued operation in the STOP mode
may cause damage to and failure of the
chiller-heater.
Purge Manual Start and Stop
The purge can be started or stopped manually.
1. Navigate to the Setting screen on the Control Pan-
el.
2. Press the Purge Mode Manual button.
3. Press the Manual Purge ON button.
98
The purge solenoid valves open. The purge operation
begins.
4. Press the Manual Purge OFF button when the
purge process is complete.
5. The solenoid valves close.
6. Press the Purge Mode Auto button.
Operation Mode Selection
You can select the operation mode of the chiller-heater.
1. Navigate to the Control Panel Setting screen.
2. Press and hold the Operation Mode Cooling or
Heating button. Hold the button for 15 seconds.
LD26800a
LD26800b
FORM 155.35-ICOM2.EN.CE/GB (1018)
After maintenance of the refrigerant
pump is complete, be sure to reset it to
Auto. Continued operation in the MAN-
UAL state may cause damage and failure
to the chiller-heater.
Set each cooling or heating changeover
valve to the correct operation mode.
JOHNSON CONTROLS
DATE: 10/30/2018
LD26800c
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Troubleshooting
