Unique WS Series User Manual

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WS
Series
Advanced air conditioning systems
Failure Code Troubleshooting (continued).
Display Possible Cause Corrective Action
5
ER5
Gas pressure too low
1. Clogged air filter
2. Faulty fan capacitor.
3. Faulty fan motor.
4. Air discharge shutters are
too closed.
5. Lack of refrigerant.
6. Condenser cooling water
is too cold.
1. Clean filter.
2. Replace capacitor.
3. Replace fan motor.
4. Open air discharge shutters.
5. Check for leaks and add
refrigerant.
6. Check cooling tower (or the
cooling water source) for proper
operation.
6
ER6
Gas pressure too high
1. Clogged water strainer.
2. Condenser cooling water
too warm.
3. No water circulation in
heat exchanger.
1. Clean strainer.
2. Check cooling tower (or the
cooling water source) for proper
operation.
3. a. Check cooling tower (or the
cooling water source) for proper
operation.
b. Heat exchanger is clogged.
Clean the heat exchanger or
replace it.
7
ER7
Only for units with
electrical heating
elements.
Heating elements
protection.
1. No air supply at indoor
side.
2. Indoor fan is not running.
3. Air shutters are closed.
1. See troubleshooting guide section
10.3 item 4
2. See troubleshooting guide section
10.3 item 7
3. Open air shutters.
8
ER8
Only for Heat Pump
Water temperature too
cold.
Lack of water or low water
flow.
1. Check water filter.
9
ER9
Return air sensor is
short-circuited or
disconnected.
Short, disconnected or faulty
return air temperature sensor.
Check return air temperature sensor.
Replace sensor if faulty.

Unique WS Series Specifications

General

Brand	Unique
Model	WS Series
Category	Air Conditioner
Language	English